Don’t promise anything ______ you are one hundred percent sure.
| A．whether | B．after | C．how | D．unless |
相关试题
—Have you known Dr. Jackson for a long time?
—Yes, since she________ the Chinese Society.
| A．has joined | B．joins | C．had joined | D．joined |
--- I’m sure Andrew will win the first prize in the final.
--- I think so. He ___________ for it for months
| A．is preparing | B．was preparing |
C．had been preparing | D．has been preparing |
So far this year we ______ a fall in house prices by between 5 and 10 percent.
| A．saw | B．see | C．had seen | D．have seen |
The hotel wasn’t particularly good. But I ____ in many worse hotels.
A. was staying B, stayed C. would stay D. had stayed
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