语法专题：情态动词

1. We __________ for her because she never came.

A. needn’t wait                                                B. shouldn’t have waited

C. mustn’t wait                                               D. mustn’t have waited

2. Where is my pen? I __________ it.

A. might lose                                                         B. would have lost

C. should have lost                                          D. must have lost

3. Janny __________ have kept her word. I wonder why she changed her mind.

A. must                                                           B. should

C. need                                                          D. would

4. We __________  last night, but we went to the concert instead.

A. must have studied                                        B. might study

C. should have studied                                     D. would study