He started to study ecology and decided to _______his whole life to the science.
| A．ignore | B．devote | C．prefer | D．lead |
The factory produces half a million pairs of shoes every year, 80% are sold abroad.
| A．of which | B．which of | C．of them | D．of that |
Her valuable advice ________ to be taken, or you will suffer more loss.
| A．deserves | B．survives | C．serves | D．proves |
—Ouch! You hurt me!
—I am sorry. But I any harm. Ito drive a rat out.
| A．didn’t mean; tried | B．don’t mean; am trying |
| C．haven’t meant; tried | D．didn’t mean; was trying |
—Did Jenny clean her house yesterday?
—She _______ because she was not quite herself.
| A．hadn’t cleaned it | B．had it cleaned | C．hasn’t cleaned it | D．has it cleaned |
Our attitude towards life is ________ makes the difference between our being happy or not.
| A．that | B．whether | C．what | D．which |