1) You ______ touch electrical wires with wet hands. a) needn't b) mustn't c) don't have to d) aren't allowed 2) We ______ last night, but we went to the concert instead. a) must have studied b) might study c) should have studied d) would study 3) A computer ______ think for itself, it must be told what to do. a) can't b) shouldn't c) must d) will 4) Jane ______ have kept her word. I wonder why she changed her mind. a) must b) should c) need d) would 5) Nancy brought some food for the party. She ______, we have plenty. a) needn't have brought b) doesn't have to c) didn't need to d) needn't 6) I didn't hear the phone. I ______ asleep. a) must be b) must have been c) should be d) should have been 7) Mother ______ us stories when we were young a) was used to tell b) is used to telling c) used to tell d) used to telling 8) You ______ return the book now. You can keep it till next week. a) can't b) mustn't c) needn't d) may not 9) What Jim says ______ true but I very much doubt it. a) should be b) will be c) must be d) may be 10) There was plenty of time. She ______. a) mustn't have hurried b) couldn't have hurried c) must not hurry d) needn't have hurried 11) Hurry up! Tom ______for us at the school gate. a) must wait b) must be waiting c) must be waited d) must have been waited 12) A: I think Jane is at home. --- B: No, she ______ be at home, for she phoned me from the airport just ten minutes ago. a) mustn't b) needn't c) can't d) daren't 13) There are so many types here, and I really don't know which one I ______ choose. a) should b) can c) may d) must 14) A: Must we do it now? --- B: No, you ______. a) won't b) needn't c) can't d) don't 15) I ______ play basketball than football. a) would rather b) had better c) like better d) prefer 16) You'd better ______ late next time. a) don't b) not be c) not being d) won't be 17) I ______ like to know where you were born. a) shall b) would c) could d) may 18) By the year 2030, it ______ possible to travel faster than the speed of light. a) may be b) must be c) should be d) might have been 19) When my father was young, he ______ work in the garden for long hours. a) can b) could c) will d) should 20) He ______ have committed the crime because he was with me on that day. a) musn't b) shouldn't c) won't d) can't

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