Our earth is getting warmer and warmer. It is time for us to_____ the emission(排放) of CO2.
#99319
A
break down
B
cut in
C
cut down
D
cut off
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---Any advice for me?---You’d better the timetable to see when the train leaves.
#99662
A
consult
B
recommend
C
remind
D
request
We all know laws to discourage the use of plastic bags _______ in many parts of the world.
#103962
A
passed
B
have passed
C
had been passed
D
have been passed
By the time Jack returned home from England, his son __________from college.
#101958
A
graduated
B
has graduated
C
had been graduating
D
had graduated
When I got there, the meeting _____ for ten minutes.
#102051
A
has been on
B
had begun
C
had been on
D
has begun
They _____ on the program for almost one week before I joined them, and now we _____ it as no good results have come out.
#101978
A
had been working; are still working
B
had worked; were still working
C
have been working; have worked
D
have worked; are still working