21. tom is a good student, ___________ he? a. doesn’t b. is c. isn’t d. does 22. yesterday i saw _______ enjoying ________ on the playground . a. her , hers b. he , him c. them , them d. them , themselves 23. the film reminded him _____ what he had seen in london. a. with b. to c. for d. of 24. mary ______ be at home, for no one answers the phone. a. must b. mustn’t c .can’t d. can
