import sys
import math



def comb(x,y):
	return 0

def hcomb(x,y):
	if x == 0:
		return y == 0
	return comb(x+y-1,y)


T=input()
mo=1000000007

for i in range(T):
	C,P=map(int,raw_input().strip().split(" "))
	if P*2-1>C:
		print 0
		continue
	elif P==1:
		print C%mo
		continue
	else:
		ret = 0
		ret += hcomb(C-(P+P-1),P-1)
		ret += hcomb(C-(P+P),P)*2
		ret += hcomb(C-(P+P+1),P+1)
		print ret % mo