题目内容
2.当他到那儿时，我们已经把房子打扫了。
when he got there.
2.We had cleaned the room
1.再也没有收到他的音信，因此我们开始想他发生了什么事。
6.The subject is rather complex,and hard to (简化) .
3.All the guests at the party were dancing and singing happily sud?denly the lights went off.
2.The death of his father have a great effect on his life.
2.I was out of the town at the time,so I don't know exactly how it (happen) .
9.By ten o'clock yesterday evening John (finish) his homework.
8.She was always cheerful and (外向的) .
5.我们藏在床底下，像老鼠似的保持安静，以便不被发现。
We hid under the bed,________________，so as not to be found.
