---Where is your sister? ---She housework at home.
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’t C. can’t
Listen! Someone _________ for help! A. called B. is calling C. has called