The factory used 65 percent of the raw materials, the rest of which _____ saved for other purposes.
| A．is | B．were | C．was | D．are |
32．In a way I can see what you mean, even though I don't ______ your point of view．
| A．agree | B．promise | C．recognize | D．Share |
31．—Can I smoke here?
—No．On no condition ______ in the museum．
| A．is smoking permitted | B．smoking is permitted |
| C．was smoking permitted | D．smoking was permitted |
30．It's a good habit to have your car brakes ______ before a long journey．
| A．to check | B．checked | C．checking | D．Check |
29．—The cleaning must have taken you quite a long time yesterday．
—Right．The rooms ______ for two months．
| A．haven't been cleaned | B．didn't clean |
| C．hadn't been cleaned | D．hadn't cleaned |
28．Kids are often told to remain ______ they are and wait for their parents if they get lost．
| A．what | B．where | C．how | D．Who |