#include <bits/stdc++.h>
using namespace std;
const long long INF = 9223372036854775807;
const long long MOD = 1000000007;
const long long FMOD = 998244353;
const long long MAXN = 1e5 + 5;
const long double eps = 1e-9;
const long double PI = acos(-1);
void __print(int x) { cerr << x; }
void __print(long x) { cerr << x; }
void __print(long long x) { cerr << x; }
void __print(unsigned x) { cerr << x; }
void __print(unsigned long x) { cerr << x; }
void __print(unsigned long long x) { cerr << x; }
void __print(float x) { cerr << x; }
void __print(double x) { cerr << x; }
void __print(long double x) { cerr << x; }
void __print(char x) { cerr << '\'' << x << '\''; }
void __print(const char *x) { cerr << '\"' << x << '\"'; }
void __print(const string &x) { cerr << '\"' << x << '\"'; }
void __print(bool x) { cerr << (x ? "true" : "false"); }
template <typename T, typename V>
void __print(const pair<T, V> &x) {
  cerr << '{';
  __print(x.first);
  cerr << ',';
  __print(x.second);
  cerr << '}';
}
template <typename T>
void __print(const T &x) {
  int f = 0;
  cerr << '{';
  for (auto &i : x) cerr << (f++ ? "," : ""), __print(i);
  cerr << "}";
}
void _print() { cerr << "]\n"; }
template <typename T, typename... V>
void _print(T t, V... v) {
  __print(t);
  if (sizeof...(v)) cerr << ", ";
  _print(v...);
}
void solve() {
  long long a, b, c, d;
  cin >> a >> b >> c >> d;
  long long ans = 0;
  if (d >= c && b < a) {
    cout << -1 << endl;
    return;
  }
  if (b >= a) {
    cout << b << endl;
    return;
  }
  if (c == d && b <= a) {
    cout << -1 << endl;
    return;
  }
  long long left = a - b;
  ;
  ans += b;
  long long taken = c - d;
  ;
  ans += (left / taken) * c;
  if (left % taken != 0) {
    ans += c;
  }
  cout << ans << endl;
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int test;
  cin >> test;
  while (test--) {
    solve();
  }
  return 0;
}
