I_______ my homework when the door bell__________.
#39940
A
did, rang
B
was doing, was ringing
C
did, was ring
D
was doing, rang
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Don’t worry. The blind man            to walk across the road soon by the policeman.
#39423
A
is helped
B
will be helped
C
was helped
D
has been helped
The flood _____ about _____ people since it happened.
#38625
A
has affected; 10 million of
B
has affected; 10 million
C
affected; 10 millions of
D
affected; 10 millions