這是省略句,補充完整：
Don't come into the room until you are asked to（come into the room）
因為與前面的句子重復(fù),所以省略了重復(fù)部分,但是一定要保留to,從to后面省略請問t's a good place to eat.對，還是 It's a good place to eat at . 對呢？為什么？這里的介詞 at 需不需要省略呢？還有: It's a good place to go還是It's a good place to go to?謝謝您！It's a good place to eat at .這是正確的。It's a good place to eat這句話的意思就是 這是一個能吃的好地方，要把地方給吃了。于是at 就不能省略了。表示 在這吃飯。It's a good place to go。這里不需要使用后面的to了，這個我是憑語感。