帮助一下，我很需要，谢谢，我会追加悬赏的

1 .This book is harder than that one. (比那本书难得多) .
2 .The teacher let us read the text after her. (她读完后) .
3 .Alice has made many friends since she came to China . (自她来中国以后) .
4 .He wants to be a doctor like his father after he grows up. (他长大以后) .
5 .That story is less interesting than that one. (不如这个故事有趣) .
6 .I’ll stay here till he comes back. (直到他回来) .
7 .I have to get everything ready before I leave. (我离开之前) .
8 . since you feel ill (既然你觉得身体不好) you’d better not go to the cinema
9 .Don’t talk while eating (吃东西时) .
10 .They still kept on working though it was so late. (虽然天已很晚) .
11 .Try to finish the work as soon as possible so as to to start another task. (以便能开始另一项工作) .
12 . She was so angry that (她很生气) she couldn’t say anything .
13 .He will go to the Summer Palace with us if he has no homework. (假如他没作业) .
14 .All the students ran into the classroom and sat in the seats quietly when the bell rang. (当上课铃响时) .
15 .Mike ran as fast as John yesterday. (昨天和约翰跑得一样快) .
16 .She said she was writing a composition. (她在写作文) .
17 .I asked him if he knew Mary (他是否认识Mary) .
18 .The old man asked me where the hospital was. (医院在哪里) .
19 .Would you please tell me which way i should go (我该走哪条路) ?
20 .Nobody knows who took away your pen. (谁拿走了你的钢笔) .
21 .Did you ask the teacher when we would have our English test (我们什么时候要进行英语测试) ?
22 .Can you tell me if I passed my math exam (我数学考试是否及格) ?
23 .She told us she had seen the film three times (这部电影她已看过三遍了) .
24 .I really don’t know how many kinds of animals there are in the world (世界上有多少种动物) .
25 .He wanted to know how long I had been there (我在那里呆了多久) .
26 .Do you remember when the first man-made satellite was sent up in China (中国什么时候发射第一个人造卫星的) ?
27 .I can’t find out why the watch doesn't work. (这只手表为什么不走了) .

没懂