Tom hid himself behind the door, _______ he rushed out to scare his mother. 
#73858
A
which
B
where
C
from which
D
from where
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You must be careful when ___ on the highway.
#67834
A
you driving
B
are driving
C
driving
D
you were driving
 I am waiting for my friend.        , I will go swimming alone.
#41034
A
If he doesn’t come
B
If he won’t come
C
If he hasn’t come
D
If he isn’t coming