Ladies and gentlemen, please fasten your seat belts. The plane         . 
#101851
A
takes off
B
is taking off
C
has taken off
D
took off
推荐题目
—Ann is in hospital.—Oh,really? I ________know.I         _____go and visit her.
#101686
A
didn’t; am going to
B
don’t; would
C
don’t; will
D
didn’t; will
Please don’t make so much noise.I     a novel.
#101730
A
writes
B
am writing
C
wrote
D
was writing
--- Why does the lake smell terrible?--- Because large quantities of water _________.
#101273
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted