At the end of the eighteenth century, masks _________ completely.
| A．ban | B．had banned |
| C．banned | D．were banned |
The best job is _______ which uses your skills in doing something together with your interest in the subject.
| A．something | B．the one | C．one | D．it |
In the past ten years, great changes _______ in my hometown.
| A．took place | B．have taken place |
| C．were taken place | D．have been taken place |
The third and last chapter _______ by Professor Chen.
| A．are written | B．are writing | C．is written | D．is writing |
-- No, I’m afraid he isn’t in. This is his secretary speaking. Can I help you?
--- _______.
| A．Oh, you will | B．Oh, that’s a pity |
| C．I should think so | D．Well, I look forward to hearing from you |
______ the plane have taken off on time?
--- I’m afraid not. The fog was too thick then.
| A．Would | B．Should | C．Can | D．Must |