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—What about going shopping together? —Sorry, I have a lot of homework ____.
#40208
A
do
B
to do
C
doing
D
did
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---         are the Winter Olympic Games held？---Every four years.
#36057
A
How far
B
How often
C
How soon
D
How long
He hurried to the railway station for the last train but didn’t         it.
#43998
A
knock
B
announce
C
rush
D
make
 They can’t go out to work        the heavy rain.
#42372
A
because
B
since
C
because of
D
as a result
 _____ are the twins arguing about with Lily?
#42398
A
Who
B
Why
C
What
D
When
There’s ______ here and there. Let’s sweep it away. 
#40606
A
students
B
people
C
balls
D
litter