题目内容
China's present environment situation is from bad to worse and if we _________ now to protect the environment, we’ll live to regret it.
| A．hadn’t acted | B．haven’t acted | C．don’t act | D．won’t act |
C
解析试题分析：句意：中国目前的环境状况越来越糟糕，如果我们现在不采取行动来保护环境，我们将会后悔。if引导的条件状语从句，主句为一般将来时态，if从句用一般现在时态，选C。
考点：考查时态
Larry, we’re glad you ______. We were beginning to drive to the station to meet you.
| A．would arrive | B．arrive | C．have arrived | D．will arrive |
--- Who’s that in the photo?
--- It’s my brother. This photo _______ fourteen years ago.
| A．would be taken | B．took | C．had been taken | D．was taken |
— The floor is dirty.
— Yes. It _______ for two days.
| A．hasn’t swept | B．didn’t sweep | C．hasn’t cleaned | D．hasn’t been cleaned |
I’ll go to the library as soon as I finish what I .
| A．was doing | B．am doing | C．have done | D．had been doing |
----We could have come here much earlier in your car.
----I agree. But it _____.
| A．is repaired | B．was being repaired |
| C．had been repaired | D．is being repaired |
.You’ll never guess who I met today—my old teacher! We_____for twenty years.
| A．don’t meet | B．haven’t met | C．hadn’t met | D．couldn’t meet |
If we earlier, we couldn’t be waiting here in a queue.
| A．have started | B．started | C．start | D．had started |
------Is your father a teacher of English in the No.l Middle School?
-------No! But he _________ English there for ten years.
| A．has taught | B．has been teaching | C．taught | D．had taught |