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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Miss Jones _______ music at Bardon School for five years when she was abroad and now she is an actress.
#102222
A
taught
B
has taught
C
had taught
D
has been teaching
Enough______ to stop the forest______ since the 1980’s.
#104373
A
has been done;be cut down
B
has done;cutting down
C
has been done;being cut down
D
had done;from being cut down
---Now, have you finished your work yet?--- Yes, I _______ it when you came.
#102162
A
have finished
B
finish
C
had finished
D
would finish
The news came as no surprise to me. I _____ for some time that the factory was going to shut down.
#104998
A
had known
B
knew
C
have known
D
know