Unit3 Looking good,feeling good-word power學案
20 when the teacher speaks, we have to keep quiet , _______?a. don’t we b. do we c. doesn’t he d. does he 21 there is no light in the dormitory. they must have gone to the lecture , ______? a. didn’t they b. don’t they c. mustn’t they d. haven’t they answer: acbd, adacb, acbdd, ccaaa, d