—Would you mind if I borrowed your car just over the weekend?
—I'm sorry, but it's just not possible, because I ________ my mother this weekend.
| A．am visiting | B．have visited |
| C．was visiting | D．visited |
No sooner _____ themselves in their seats in the theatre _______ the curtain went up.
| A．they have settled; before | B．had they settled; than |
| C．have they settled; when | D．they had settled;than |
Only when _______ .
| A．did he arrive the meeting began | B．he arrived did the meeting begin |
| C．did he arrive the meeting begin | D．he arrived the meeting began |
Then _______ we had been looking forward to.
| A．came the hour | B．the hour came |
| C．comes the hour | D．the hour is coming |
Little________what you said. I wish you had repeated it!
| A．did I understand | B．I understood |
| C．I did understand | D．have I understood |
He has been to America twice, _____.
| A．so have I | B．so I have | C．I have so | D．so did I |