____ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.
| A．While | B．As | C．If | D．Since |
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 |
We are living in an age _______ many things can be done on computers and the Internet.
| A．which | B．that |
| C．whose | D．when |
Her sister has become a lawyer, _______ she wanted to be.
| A．who | B．that |
| C．what | D．which |
_______ is often the case, we have worked out the production plan.
| A．Which | B．When |
| C．What | D．As |
—Do you have anything to say for yourselves?
—Yes, there’s one point _______ we must insist on.
| A．why | B．where |
| C．how | D．/ |