I have learned from my bitter experience we don’t know
we’ve got until it’s gone.
| A．that; that | B．what; what |
| C．that; what | D．which; that |
Computersin offices and homes since 1970s．
| A．have been used | B．had been used | C．was | D．has been used |
More attention must be paid ____ the endangered animals.
| A．protect | B．to protect | C．to protecting | D．protecting |
She doesn’t like the way _______ you speak to her.
| A．to | B．in that | C．how | D．in which |
The young man helped the company recover, so his boss gave him an apartment
_________.
| A．in return | B．in turn | C．in charge | D．in fact |
__________, he caught up with others.
| A．With the help of the teacher’s |
| B．With the teacher’s help |
| C．By the teacher’s help |
| D．On the teacher’s help |