#include <cstdio>

typedef long long ll;

long long power_modulo_fast(ll a, ll b, ll mod) {
   ll i, result = 1, x = a%mod;

   for (i=1; i<=b; i<<=1) {
       x %= mod;
       if ((b&i) != 0) {
           result *= x;
           result %= mod;
       }
       x *= x;
   }

   return result;
}

ll silnia[1000002];

int main () {
	  int t, n, k;
    ll wyn = 0;
    silnia[1] = 1;
    for (ll i = 2; i <= 1000001; i++)
        silnia[i] = (silnia[i-1]*i)%1000000007;

    scanf ("%d", &t)?:0;
    for (int i = 0; i < t; i++) {
        scanf ("%d %d", &n, &k)?:0;
        if (n > k + 1)
            printf ("0\n");
        else if (n == k+1)
            printf ("1\n");
        else
            printf ("%lld\n",
                    ((silnia[k+1] * power_modulo_fast(silnia[k-n+1], 1000000005, 1000000007)) % 1000000007
                                  * power_modulo_fast(silnia[n], 1000000005, 1000000007)) % 1000000007);
    }
    return 0;
}