用括号内所给动词的正确形式填空(共5小题;每小题1分。满分5分) 【小题1】—I hear that Sam has gone to Beijing for his holiday. —Oh, how nice! Do you know when he ________ (leave)? 【小题2】—What’s wrong with my computer, Jim? —Let me see. Oh, it _________ (break) down. You’d better ask Mr. Li to mend it. 【小题3】The reporter said that the UFO _________ (travel) from east to west when he saw it. 【小题4】Look! The teenagers are making cards ________ (show) love for their mothers. 【小题5】-That important problem __________ (discuss) for nearly two weeks. -Yes, it’s hard for us to solve it.