He ____ writing the paper now. He hadn’t written a single word when I left him ten minutes ago.
| A．shouldn’t be | B．can’t have finished | C．can’t be | D．mustn’t have finished |
Take a taxi,___________ you'll miss your train.
| A．in | B．during | C．throughout | D．within |
________ is quite natural,a beginner can't read the books written in English
very quickly.
| A．Which | B．As | C．What | D．It |
—Do you regret paying 500 dollars for your necklace?
--No, I would gladly pay__________ for it.
| A．two times as much | B．twice as many |
| C．twice as much | D．as twice as much |
__________ it rain, the crops_____________.
| A．Shall,would be saved | B．Should, would be saved |
| C．Would, should be safe | D．Were, might be safe |
--You forgot your keys when you left home in the morning.
--Good heavens,___________.
| A．so did I. | B．so I did. | C．so you did. | D．so did you. |