Ladies and gentlemen, please fasten your seat belts .The plane _____ .
#101606
A
takes off
B
is taking off
C
has taken off
D
took off
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You _____ television. Why not do something more active?
#101343
A
always watch
B
are always watching
C
have always watching
D
have always been watching
—What’s that noise,John?—Sorry,Linda.I forgot to tell you.The school library________.
#99403
A
is rebuilt
B
is being rebuilt
C
was rebuilt
D
has been rebuilt
Large quantities of information, as well as some timely help ________ since the organization was built.
#100487
A
has offered
B
had been offered
C
have been offered
D
is offered