—Must I turn off the gas after cooking?
—Of course, you can never be ____careful with that．
| A．enough | B．very | C．so | D．Too |
—Shall I call you at 10 tomorrow morning?
—Better not. I ______ a lecture to some university students. Just send me a message.
| A．would give | B．will be giving | C．will have given | D．am giving |
According to some students, ______ listening practice is still ______ must in Senior 3, because it helps promote the sense of language.
| A．the, a | B．the, \ | C．\, a | D．\, an |
It is important to know about the cultural differences that cause problems.
| A．must | B．dare | C．shall | D．may |
If we earlier, we couldn’t be waiting here in a queue.
| A．have started | B．started | C．start | D．had started |
Our country should set up more national parks animals can live freely.
| A．when | B．which | C．where | D．whose |