T = input()

# (C-2P+2)*...*(C-P+1)=(C-P+1)!/(C-2P+1)!

memo = [1, 128233642, 993191796, 246084337, 175673566, 883787401, 470931556, 119995528, 225567908, 757928892, 250015370, 913979655, 754758, 207715304, 680281231, 630322311, 642314838, 834078844, 599226039, 918470969, 777847830, 188150013, 936569805, 609321015, 803755964, 506567627, 733034722, 525152703, 125374323, 229063893, 64381203, 331225140, 239876153, 938119791, 238030663, 963888220, 269540267, 288849729, 868543185, 176093029, 129227219, 57384053, 510217116, 42904984, 1283621, 229119361, 122050053, 83923714, 99441611, 723598838, 664720426, 824990192, 899870337, 994461247, 78470227, 616312139, 585511607, 457301297, 774218347, 24761471, 220551652, 797724439, 42696969, 433164019, 825454299, 183907026, 881797659, 823559228, 703904407, 624713517, 805011386, 175293956, 157911929, 315160646, 59387184, 711105445, 710926865, 239798930, 734168782, 513146799, 71626953, 883937988, 613778426, 107738376, 960564286, 84887701, 771212964, 71595332, 319321717, 980960223, 368173468, 67320689, 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151885002, 151752857, 953328299, 274699378, 797580192, 900864549, 977052491, 903191059, 560104200, 52364315, 317587469, 733519519, 51326765, 172718980, 394213323, 499127130, 125665101, 599958067, 570048626, 358205301, 955898164, 396169962, 863114450, 524877565, 561615134, 336979830, 751853389, 98033418, 914857313, 669594871, 233002010, 798378948, 353985696, 132400827, 853908795, 633800050, 114199369, 8366891, 369520637, 840068688, 154949227, 766964103, 1213933, 283566441, 213654982, 766431359, 140028557, 389857786, 592586116, 294866824, 626984599, 88266364, 960355422, 299777072, 159529372, 433368021, 546910609, 640482852, 176367836, 62590712, 619758852, 519471843, 689296297, 688241748, 125464096, 549853046, 180640016, 669655376, 304486472, 552708211, 641131096, 250145685, 522823788, 422054382, 614827289, 213695506, 564996794, 816097193, 472957326, 627305145, 419352923, 233618208, 201907686, 789638131, 935757716, 321551236, 258348634, 248012645, 915754672, 94217171, 566557194, 883879696, 841856794, 386613162, 570112346, 183700660, 278268556, 308943479, 160666387, 737303060, 567134616, 327727771, 639296326, 219084929, 949740710, 467443562, 16455771, 875530545, 782951703, 711107295, 863411295, 578371653, 66207956, 375238282, 908681407, 515884084, 90795523, 455372810, 89837046, 165491515, 545433366, 660354454, 653260780, 270146387, 283056775, 39236829, 89221906, 548284763, 958657863, 647273634, 738216290, 960141650, 192631043, 647619052, 435099529, 111019175, 387052722, 349026437, 943168803, 597199864, 798930903, 280032050, 191489048, 871756271, 864201473, 573902924, 776735804, 795907052, 513212481, 703258263, 151087418, 176917020, 492333520, 645927523, 842232145, 918613011, 167094468, 506609335, 871613850, 791653278, 688384948, 512230762, 466482156, 483519685, 433675444, 266224879, 712040274, 316470404, 6297629, 247528343, 266547054, 831469341, 917532298, 459833872, 954893577, 614837703, 484625452, 614869637, 917743182, 905427381, 449126127, 796820262, 408509829, 273602905, 130924280, 1363238, 389499824, 954805317, 932440256, 34161376, 646994455, 672836257, 808301053, 929096963, 231765547, 390778694, 403445961, 653868071, 549355895, 901843642, 882716412, 125812900, 266137390, 250231633, 801863164, 862419855, 603909210, 141087179, 919738330, 901776094, 636804992, 717115643, 982881315, 278589981, 897622715, 592874475, 963773361, 139945137, 389252372, 890252510, 865544569, 462018791, 972099566, 849449796, 319640588, 967009768, 977653667, 710029654, 805234475, 831002177, 275336330, 422855006, 949746887, 541794170, 641881338, 296285475, 292901421, 107561334, 338689309, 112458779, 325082011, 3976415, 304229218, 601214344, 86328828, 751441489, 862204727, 554702266, 186018851, 166853623, 545193868, 432626342, 498556538, 860331963, 609479011, 974179405, 836442658, 315554906, 589911857, 242364047, 745675667, 630588185, 96935486, 898831734, 753652548, 83905053, 205072787, 486649120, 696978729, 371086126, 376354590, 740911902, 983182992, 959047580, 971565881, 279013191, 628219669, 483423122, 559666181, 748528679, 349865602, 276254737, 103092679, 990713044, 883898451, 334011645, 643112778, 85592384, 110938911, 78761716, 162118715, 110215007, 361560450, 218658983, 958290706, 760866197, 29604925, 704254054, 884528885, 571553124, 722545849, 511824535, 189127084, 293444525, 539142876, 642675615, 952158794, 312246024, 275756454, 200298706, 261130169, 62294542, 510890694, 385243308, 87361521, 503202218, 685328461, 550921230, 668093102, 699944378, 251795690, 907314994, 834548983, 352821537, 549529635, 281274542, 587974019, 795434349, 753132255, 415545290, 77523025, 281787237, 176567548, 722869575, 34478434, 714412522, 671034944, 329114990, 958416239, 745926726, 754875902, 211334210, 513547036, 381109223, 400825307, 949915497, 794380771, 663920989, 690042117, 830304630, 901554891, 751723357, 837761558, 378511108, 115298175, 325447247, 614534142, 840758997, 813807256, 591333543, 691718994, 672655144, 699954263, 85458370, 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mod = 10 ** 9 + 7

def modF(n):
	global memo, mod
	k = n / 10 ** 6
	res = memo[k]
	k *= 10 ** 6
	for i in xrange(max(k, 1), n + 1):
		res = res * i % mod
	return res

mod = 10 ** 9 + 7

for _ in xrange(T):
	C, P = map(int, raw_input().split())
	if C - P + 1 <= 0:
		print 0
	elif (C - P + 1) / mod * mod >= C - 2 * P + 2:
		print 0
	else:
		ans = modF((C - P + 1) % mod) * pow(modF((C - 2 * P + 1) % mod), mod - 2, mod) % mod
		print ans