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---- What was wrong with you yesterday evening?---- I ____ my homework when the light went off suddenly.
#42201
A
doing
B
was doing
C
did
D
have done
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His grandmother has been ________ for more than ten years. 
#38545
A
died
B
death
C
dying
D
dead
—— _______  you watching TV?    —— Yes, I _________.
#41496
A
Do, do
B
Can, can
C
Are, am
D
Are, do
The population of the world         still         now.
#42222
A
will; grow
B
has; grown
C
is; growing
D
is; grown
If it       rain tomorrow，we’ll go on a trip.
#39744
A
isn’t
B
doesn’t
C
won’t
D
is going to
Our math teacher ______ in our school for 20 years and he _____ here when he was 23 years old.
#42131
A
has taught, has come
B
taught, comes
C
taught, came
D
has taught, came