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
This machine _____. It hasn’t worked for years.
#104567
A
didn’t work
B
wasn’t working
C
doesn’t work
D
isn’t working
Look, here ___ the bus!
#103964
A
comes
B
is coming
C
will come
D
has come
—What’s that terrible noise? —The neighbors ________ for a party. 
#104750
A
have prepared
B
are preparing
C
prepare
D
will prepare
 The room _______ very useful when we had visitors.
#101127
A
was proved
B
has been proved
C
has proved
D
proved