Swan Lake is a famous ballet in four acts, ________ on a German fairy tale.
| A．basing | B．based | C．bases | D．to base |
Haven’t I told you that you __________ have the answer tomorrow morning?
| A．will | B．shall | C．should | D．would |
Jane’s pale face suggested that she ____ ill, and her parents suggested that she ____ a medical examination.A be; should have B was; have C should be; had D was; has
We ____ last night, but we went to the concert instead.A must have studied B might studyC should have studied D would study
I ______ have been more than six years old when the accident happened.
| A．shouldn’t | B．couldn’t | C．mustn’t | D．needn’t |
-Is there any flight to New York today?--I think there ____ be, for the weather is too bad.A mustn’t B may not C shouldn’t D can’t