—Do you mind if I shut down the radio?
—_____. The good news will be on the air in a few minutes.
| A．Of course not | B．I’m afraid I do |
| C．why not | D．Yes, just go ahead |
24. _____ any biscuits that morning, we had nothing to eat.
| A．Not baking | B．Not having baked |
| C．Not being baked | D．Not having been baked |
23.— It’s a long time _____ I saw you last.
— Yes, and what a pity! It will be a long time ____ we see each other again.
| A．before, since | B．since, before | C．when, when | D．since, when |
22.______ in natural gas and oil, so this area is worth developing.
| A．Being rich | B．It is rich | C．It being rich | D．To be rich |
21.Here’s one of the best ways to protect your skin—_____ too much sunshine.
| A．not to absorb | B．not having absorbed |
| C．having not absorbed | D．don’t absorb |
20.There used__________a post office at the corner of the street.
| A．to be | B．to being | C．to have | D．to having |