Proper first aid can save a seriously injured person，especially when he or she is bleeding heavily or______.
#104358
A
has poisoned
B
was poisoned
C
has been poisoned
D
is poisoning
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Land animals are believed ______ from sea animals.
#103259
A
to have developed
B
to have been developed
C
having developed
D
having been developed
A fire broke out in the neighborhood last night. By the time the firemen arrived, it .
#101011
A
had been put out
B
would put out
C
has been put out
D
was putting out
---You speak very good French!---Thanks. I _____ French in Sichuan University for four years.
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A
tudy
B
tudied
C
as studying
D
ad studied
Edward, you play so well, but I _____ you play the piano.
#102085
A
didn’t know
B
hadn’t known
C
don’t know
D
haven’t known
He left his hometown in 1990, and great changes _________ ever since.
#99346
A
had taken place
B
took place
C
have been take place
D
have taken place