—We are planning to have a casual get-together this Saturday or Sunday. Are you coming?
—______. I’ve got rather a busy day this weekend.
| A．I hope so | B．Sounds great | C．You’d better not | D．I’m afraid not |
We waited and waited.________ we had been looking forward to．
| A．Then came the moment | B．Then did the moment come |
| C．Then the moment came | D．The moment then came |
— Are you going to the concert tomorrow?
— ___________I’m not sure whether I could finish my paper before that．
| A．Come off it | B．You’ve a point there |
| C．It depends | D．In my opinion |
This old professor insisted that he _____energetic enough and that he _____．
| A．be, shouldn’t retire | B．was, not retire |
| C．should be, shouldn’t retire | D．was, should retire |
The living room is clean and tidy, ________ a dining table already laid for a meal to be cooked.
| A．as | B．which | C．with | D．That |
Scientists say it will be five or six years ________ it is possible to test this medicine on humans．
| A．after | B．before | C．since | D．When |