Every possible means ______ to prevent the air pollution, but the sky is still not clear.

 Every possible means ______ to prevent the air pollution, but the sky is still not clear.

#85598

has been used　

have been used

is used　

are used

推荐题目

The young often＿＿＿the old in our town．

#86227

helps

wants to help

help

helping

 ----Who _____ to borrow a bike? ----Daniel _____.

#43704

want; is

want; does

wants; does

wants; is

I don't like      .

#43453

late

be late

to late

to be late

      everyone in your family       meat?

#44103

Does; like

Does; likes

Do; likes

Do; like

The teacher， together with the students, _ __ discussing Reading Skills that ______ newly published in America.

#85913

are; were

is; were

are; was

is; was

共1265题