单句改错 1.The mother was standing at the gate, anxiously to see her son. __ __ 2.They have been appointed a new head teacher at the school already. __ __ 3.With all the houses being burnt to the ground, they had no place to live in. __ __ 4.To students, you'd better choose the activities which interest you and suit to you. __ __ 5.The test finishing, we began our holiday. __ __ 6.I was about to leave while the telephone rang. __ __