题目内容
.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 |
C
解析试题分析：句意：你绝对猜不到我今天遇见谁了——我之前的老师，我们20年没有见过了。因为和老师20年没有见面是在今天见到他之前，是过去的过去的动作，用过去完成时，选C。
考点：考查时态
新非凡教辅冲刺100分系列答案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 |
Do you know how many people ______ up to now?
| A．have invited | B．have been invited | C．had invited | D．had been invited |
—I counted sheep, I drank milk and I tried everything, but nothing helped.
—It seems you _____ too much recently. Try some sleeping pills.
| A．worked | B．work | C．had worked | D．have been working |
I have been studying computer for years and I still ___.
| A．have | B．do | C．have been | D．am |
The old woman who______in the deserted house alone for ten years has been settled in a nursing home now.
| A．lived | B．has lived | C．had lived | D．has been living |
—Do you remember when I first met you?
—Of course. I __________ in a small food factory.
| A．worked | B．was working | C．had been working | D．work |
I had been working on math for the whole afternoon and the numbers ________ before my eyes.
| A．swim | B．swam | C．swimming | D．had swum |
I don’t smoke now, but I _______ for more than twenty years.
| A．smoked | B．was smoking | C．have smoked | D．had smoked |