Every possible means _____ to prevent the air pollution, but the sky is still not clear.
A.is used
B.are used
C.has been used
D.have been used
试卷相关题目
- 1The moment the 28th Olympic Games _______ open, the whole world cheered.
A.declared
B.have been declared
C.have declared
D.were declared
开始考试点击查看答案 - 2Every necessary means____ to protect milu deer which____ very valuable to us. As a result, the number of milu deer is increasing.
A.are used; is
B.is being used; is
C.have been used; are
D.has been used; are
开始考试点击查看答案 - 3Two pieces of good news about our company ____ published in today's newspaper.
A.have
B.have been
C.was
D.is
开始考试点击查看答案 - 4When and where to enjoy our summer vacation _____ yet.
A.aren't decided
B.isn't being decided
C.hasn't been decided
D.haven't been decided
开始考试点击查看答案 - 5The factory produced a large amount of furniture last year, so far 65 percent of which _____ exported to some European countries.
A.hasbeen
B.are
C.was
D.were
开始考试点击查看答案 - 6If Newton lived today, he would be surprised by what ____ in science and technology.
A.had discovered
B.had been discovered
C.has discovered
D.has been discovered
开始考试点击查看答案 - 7— Why does the Lake smell terrible? — Because large quantities of water _____.
A.have polluted
B.is being polluted
C.has been polluted
D.have been polluted
开始考试点击查看答案 - 8— Time________.It's likely that we'll miss the deadline. — Don't worry.We have already got through 80% of the job.
A.is running out
B.has run out
C.is being running out
D.has been run out
开始考试点击查看答案 - 9— How long _____ at this job?— Since 1990.
A.were you employed
B.have you been employed
C.had you been employed
D.will you be employed
开始考试点击查看答案 - 10—Hey! Here is a message on my cell phone, telling me to send money to....—Delete it! It's a trick. Many a person ____ by such tricks.
A.has been cheated
B.have been cheated
C.were cheated
D.was cheated
开始考试点击查看答案