2. 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

2.    B考查動詞的時態(tài)。句霧：自人類開始園藝的時期起，我們就一直努力把我們的環(huán)境變得更加美好。根據(jù)since的提示可知用現(xiàn)在完成時，再根據(jù)語境可知，動作try從過去一直持續(xù)到現(xiàn)在，而且還要繼續(xù)進行下去，因此用現(xiàn)在完成進行時。

題目來源：2015全品語法快練高中英語新課標 > 訓練15 動詞的時（語）態(tài)和主謂一致

練習冊系列答案
相關習題

科目：高中英語 來源： 題型：

3.  During the Spring Festival,children ____________________ (玩得開心)each other.

查看答案和解析>>

科目：高中英語 來源： 題型：

1. She     someone, so I nodded to her and went away.

A. phoned        B.  had phoned

C. was phoning    D.  has phoned

查看答案和解析>>

科目：高中英語 來源： 題型：

14. According  to the  art dealer， the painting   to go for at least a million dollars.

A. is expected       B. expects

C. expected       D.  is expecting

查看答案和解析>>

科目：高中英語 來源： 題型：

13. ―The road repairs   on 7th Avenue.

―OK. We'll take Park Avenue then.

A. are carrying out        B. have been carried out

C.  have carried out      D. are being carried out

查看答案和解析>>

科目：高中英語 來源： 題型：

7. ―Does your father smoke?

―    ，it's two years since he .

A. Yes; smoked      B.  No; smoked

C. Yes; smokes       D.  No; has smoked

查看答案和解析>>

科目：高中英語 來源： 題型：

19. Look ！ There is a whole crowd of people over there. Go and see what   and if it is a bargain,buy it.

A. is selling       B. has been selling

C. is being sold    D. has been sold

查看答案和解析>>

科目：高中英語 來源： 題型：

6. I      to go to your party yesterday evening, but I had an unexpected visitor.

A. intended     B. had intended

C. would intend   D. would have intended

查看答案和解析>>

科目：高中英語 來源： 題型：

4. [2014 •湖南卷〗Children, when        by their parents, are allowed to enter the stadium.

A.    to be accompanied

B.    to accompany

C.    accompanying

D.    accompanied

查看答案和解析>>

同步練習冊答案