Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
| A．/; the | B．the; / | C．an; the | D．the; a |
When television was first introduced, the extent _______ it would affect society could not have been foreseen.
| A．of which | B．of what | C．to which | D．in which |
He thought the jar made ______ earth ______ little value and let me have it ______ only 5 dollars.
| A．of; of; for | B．from; of; by | C．from; with; for | D．of; of; by |
--- I recommend you first give up smoking, and then try to find a job so that you’ll start a new life.
--- _______.
| A．Not in the least | B．Easier said than done |
| C．It’s up to you | D．That all depends |
The conservation area is very important for preserving many animals and plants, which would ______ run the risk of becoming extinct.
| A．otherwise | B．therefore | C．though | D．instead |
______ we think of Ben, we have to admit that he is a highly competent man.
| A．However | B．Whether | C．Whichever | D．Whatever |