I don’t know who invented _____digital camera, and it’s really _____ most useful invention.
A.the; a | B.the; the | C.a; a | D.不填;不填 |
He ______ the test again, in which case, his mother will be very disappointed.
A.might fail | B.must have failed |
C.should fail | D.could have failed |
I didn’t see her in the meeting room this morning. She ______ have spoken at the meeting.
A.mustn’t | B.shouldn’t |
C.needn’t | D.couldn’t |
They often go to the restaurants for meals. They _____ be very poor.
A.mustn’t | B.can’t |
C.may not | D.needn’t |
“Shall we go shopping?” “Sorry, we _______ buy anything now because none of the shops are open.”
A.mustn’t | B.needn’t |
C.can’t | D.shouldn’t |
I _______ have met him a long time ago. Both his name and face are very familiar.
A.may | B.can |
C.would | D.should |