30．They can’t afford to buy the latest equipment at present．_______，they keep trying new ways to improve efficiency．
| A．On the contrary | B．In contrast | C．Nevertheless | D．Furthermore |
All their attempts to rescue the child from the burning building were _____, and he died soon.
| A．in place | B．in return | C．in vain | D．in ruins |
Be careful when you cross this busy street. ________, you may get run over by a car.
| A．If not | B．If so | C．If any | D．If possible |
Smoking is so harmful to people’s health that it kills __________ people each year than automobile accidents.
| A．seven more times | B．seven times more |
| C．over seven times | D．seven times |
I’ll come to pay a visit to you if _______ this weekend.
| A．you’re convenient | B．it is convenient for you |
| C．you feel convenient | D．it is convenient with you |
The student was_______ a gold cup for his excellent performance in the competition.
| A．awarded | B．admitted | C．applied | D．advanced |