Did you arrive here this morning?—Yes,it was at nine o’clock we came here.
_____________ will the students be back from Qufu?-In about half an hour，I think. [ ]
Look at the wall. There are some pictures ________ it. [ ]
I’m terribly sorry to keep you waiting for so long． — _______．
I lost my way. I wonder ________ I can turn in the dark.