Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
| A．the; the | B．/;a | C．/; the | D．the; a |
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
Naturally, after I told her what to do, my daughter _____ go and do the opposite!
| A．may | B．can | C．must | D．should |