#include <bits/stdc++.h>

using namespace std;
const int INF = 0x3f3f3f3f;
typedef long long LL;
const int N = 1e5 + 10;
const int mod = 1e9 + 7;
int fact[N];
int infact[N];
int qmi(int a, int k, int p) {
    int res = 1;
    while (k) {
        if (k & 1) res = (LL)res * a % p;
        a = (LL)a * a % p;
        k >>= 1;
    }
    return res;
}
int main() {
    fact[0] = infact[0] = 1;
    for (int i = 1; i < N; i++) {
        fact[i] = (LL)fact[i - 1] * i % mod;
        infact[i] = (LL)infact[i - 1] * qmi(i, mod - 2, mod) % mod;
    }
    int n;
    scanf("%d", &n);
    while (n--) {
        int a, b;
        scanf("%d %d", &a, &b);
        printf("%d\n", (LL)fact[a] * infact[b] % mod * infact[a - b] % mod);
    }
    return 0;
}