一眨眼学位英语即将开考！（我的内心是拒绝的）然而，自己选择的路，跪着也要走完……在考前更后十天里，赵老师将为大家每天讲解语法/阅读冲刺答题技巧，并附有老师每日语音教学（关注微信即可听讲），想拿高分的考生们快来跟随老师一起冲刺吧！

　　今日话题：情态动词的答题技巧，快来关注赵文通老师微信跟随老师一起边听边学吧！>>>

微信名称：学位英语赵文通老师

微信号：xueweiyingyukaoshi

答题小技巧>>>

如果选项中出现“情态动词＋完成时”，这个选项一般说来是正确答案。

答题技巧应用>>>

1. Nobody knows how people first came to these islands. They ____ from South America on rafts.

A. must have sailed

B. can sail

C. might have sailed

D. should have sailed

2. Mary was not in her bedroom yesterday afternoon. She ____ in her classroom.

A. should have been

B. must have been

C. must be

D. should be

3. Bob said he was going to join our club but he didn't. He ____ his mind.

A. can't have changed

B. wouldn't have changed

C. must have changed

D. shouldn't have changed

4. You____ to town to see the film yesterday. It will be on TV tonight.

A. needn't go

B. had better not go

C. should not go

D. needn't have gone

5. We____ the letter yesterday, but it didn't arrive.

A. must receive

B. ought to receive

C. must have received

D. ought to have received

（提示：例句的参考答案和解析隐藏在老师的语音中等你来发现哦！）