Is this the reason__________at the meeting for his carelessness in his work?
| A．he explained | B．what he explained | C．how he explained | D．why he explained |
--What are you going to do this afternoon?
-- I am going to the cinema with some friends. The film _______ quite early, so we __________ to the bookstore after that.
| A．finished; are going | B．finished; go |
| C．finishes; are going | D．finishes; go |
It was a time_______ the killer whales helped the whalers catch the baleen whales.
| A．when | B．that | C．then | D．which |
The most important thing about cotton in history is ______part that it played in _______Industrial Revolution.
| A．∕；∕ | B．the；∕ | C．the; the | D．a; the |
–Good morning． I’ve got an appointment with Miss Smith in the Personnel Department．
–Ah, good morning． You _____ be Mrs． Peters．
| A．might | B．must |
| C．would | D．can |
We _____ on this project for four hours． Let’s have a rest．
| A．are working | B．have been working |
| C．worked | D．had worked |