---Mr. Black, I just can’t get my car started. I think there’s something wrong with the engine.
---Oh, let me see. Ah, that is not _______ it is. Actually, your car has used up all the petrol.
| A．where | B．when |
| C．what | D．how |
The company ______ founded in 2005 and most of the employees ______ women.
| A．are; are | B．was; were | C．are; is | D．were; was |
Where are you working now?
-In a big company. But I ___in a small workshop for 5 years in the countryside.
| A．has worked | B．had worked | C．was working | D．worked |
It is often said that ____teachers lead _______very busy life.
A /, / B. /, a C. the, / D. the, a
—I’m going to play soccer now.
—________. It’s raining heavily outside.
| A．Good idea | B．It’s up to you | C．You’d better not | D．I have no idea |
No one has yet succeeded in solving the _____ of how life first began.
| A．biology | B．gravity | C．puzzle | D．theory |