#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define endl '\n'
const int N=2e5+10;
ll MOD = 1e9+7;
const int MAX = 1e5 + 5;
ll fact[MAX];

// Precompute factorials
void computeFactorials() {
    fact[0] = 1;
    for (int i = 1; i < MAX; ++i)
        fact[i] = (fact[i - 1] * i) % MOD;
}
ll modInverse(ll a, ll m = MOD) {
    ll res = 1;
    ll b = m - 2;
    while (b) {
        if (b & 1) res = (res * a) % m;
        a = (a * a) % m;
        b >>= 1;
    }
    return res;
}
long long modPow(ll a,ll b){
    ll ans = 1;
    while(b>0){
        if(b&1) ans=(ans*a)%MOD;
        b>>=1;
        a=(a*a)% MOD;
    }
    return ans;
}
ll nCr(int n, int r) {
    if (r > n) return 0;
    return fact[n] * modInverse(fact[r]) % MOD * modInverse(fact[n - r]) % MOD;
}

ll nPr(int n, int r) {
    if (r > n) return 0;
    return fact[n] * modInverse(fact[n - r]) % MOD;
}
void solve(){
    ll ans = 0;
    ll n,k;cin >> n>>k;
    vector<int>p(n);
    ll one = 0;
    ll zero = 0;
    for(int i = 0; i < n ; i++){
        cin >> p[i];
        if(p[i] == 0) zero++;
        else one++;
    }
    ll nts = modPow(2,zero);
    for(int i = k; i < one ; i++){
        ans += (nCr(one,one-i)*nts);
        ans %= MOD;
    }
    ll mt = nts-1;
    ans += nCr(one,0)*mt;
    ans %= MOD;
    cout << ans << endl; 
}

int main() {
    computeFactorials();
    int t; cin >> t;
    while (t--)
    {
        solve();
    }
    
    return 0;
}