应该是at the entrance：一共三种情况：1、表示“入口、通道”等,加to,如at the entrance to the theatre；2、表示“进来、进入”等意加into或onto,如 the Prime Minister's entrance into office 首相就职；3、表示“进入的权利、准予进入：加to,如 They were refused entrance to the building.他们未获准进入大楼.
应该是at the entrance：一共三种情况：1、表示“入口、通道”等,加to,如at the entrance to the theatre；2、表示“进来、进入”等意加into或onto,如 the Prime Minister's entrance into office 首相就职；3、表示“进入的权利、准予进入：加to,如 They were refused entrance to the building.他们未获准进入大楼.