Is there any possible way to help them get rid of such a bad habit?--- To tell the truth, it’s very hard. But we   on this problem trying to improve the situation.
#104678
A
worked
B
had worked
C
are working
D
had been working
推荐题目
In 1960, this was the longest bridge that __________.
#104497
A
was ever built
B
had ever built
C
has ever been built
D
had ever been built
Give me an undisturbed hour and I’ll see the work Tom ___ unfinished.
#103595
A
will leave
B
is leaving
C
has left
D
had left
He complained that this was the third time he _________ of the changes of the meeting.            
#102890
A
is informed
B
was informed
C
has been informed
D
had been informed