— _____ are stamps used ______? — Sending letters.
Mary didn’t go to John’s birthday party because she ________. A. wasn’t invited B. didn’t invite C. isn’t invited
Tony wants _______a job as a language teacher in China. A. to find B. finding C. find
—Do you know ________ she went to the movie last night? —On foot. A. when B. why C. how
—Let’s go dancing tonight.! —Sorry, I ________.I have to go to my guitar lesson. A. mustn’t B. needn’tC. can’t
Listen! Someone _________ for help! A. called B. is calling C. has called