.
According to some doctors, one of the ways to prevent us from growing old is to make sure
that our brains get enough___.
| A．performance | B．exercise | C．experience | D．sport |
Oh, I’m not feeling well in the stomach, I __________ so much fried chicken just now.
| A．shouldn’t eat | B．mustn’t have eaten |
| C．shouldn’t have eaten | D．mustn’t eat |
. you like it or not, you'll have to give up smoking.
| A．If | B．Whether | C．How | D．Why |
Your shirt needs ____. You'd better have it done today.
| A．iron | B．to iron | C．ironing | D．being ironed |
—Why is Mr. Li so happy this morning?
—Because he was honoured with a(n)______ for excellence in teaching.
| A．present | B．gift | C．award | D．reward |
________ you are interested in astronomy, you can read the book.
| A．Even if | B．Now that | C．Unless | D．As soon as |