—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 .
#101218
A
worked
B
had worked
C
are working
D
had been working
推荐题目
Scientific experiments __________ by students without the teachers’ instructions can be dangerous.
#103839
A
carry out
B
carrying out
C
carried out
D
carrying
Residents ________ not to go out alone or to take part in any groups during the period of recent terrorist activities.
#104240
A
were always being warned
B
are always warning
C
always warned
D
had always been warned
The interviewer will begin to judge you as soon as he or she ________ you in the waiting room.
#101190
A
sees
B
will see
C
is seeing
D
saw
- Will you be available at three o'clock tomorrow afternoon? - No. I ______ a lecture then.
#99897
A
are attending
B
will have attended
C
will attend
D
will be attending