题目内容
Since the time humankind started gardening, we _____to make our environment more beautiful.
| A．try | B．have been trying |
| C．are trying | D．will try |
B
解析试题分析：考查动词时态。Since 作为介词,后接某一确定的时间点,主句谓语动词是持续性动词,常与现在完成时态、现在完成进行时态或过去完成时态连用。句意：自从人类开始园艺，我们一直尽力使我们的环境更美丽。故B正确。
考点：考查动词时态
---Why don’t we choose that road to save time?
--- The bridge to it_____.
| A．has repaired | B．is repaired |
| C．is being repaired | D．will be repaired |
Sofia looked around at all the faces: she had the impression that she _____ most of the guests before.
| A．has seen | B．had seen | C．saw | D．would see |
Sheldon could have defeated Howard in the match, but he _______ too careless at the last minute.
| A．is | B．was |
| C．has been | D．had been |
They made up their mind that they______ a new house once Larry changed jobs.
| A．bought | B．would buy | C．have bought | D．had bought |
He_____ articles for our wall-newspaper these years, and he____ about thirty articles.
| A．has written; wrote | B．has been writing; wrote |
| C．is writing; has been writing | D．has been writing; has written |
In the last few years thousands of films ________all over the word.(2011·天津)
| A．have produced | B．have been produced |
| C．are producing | D．are being produced |
（2014年安徽省合肥市高三第三次教学质量检测）27. The general manager can't use his office at the moment, which ______.
| A．is being redecorated | B．has been redecorated |
| C．is redecorated | D．was redecorated |
—What a mistake!
—Yes. I________his doing it another way, but without
success.
| A．was suggesting | B．will suggest |
| C．would suggest | D．had suggested |