He made another wonderful discovery, ______ of great importance to science.
#92237
A
which I think it is
B
which I think is
C
which I think
D
I think which is
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Oh, much smoke here! Somebody _______ the window, please.
#92205
A
opens
B
open
C
shall open
D
will open
 Just after putting away the dishes, _______.
#93684
A
the doorbell was rung
B
mother heard the doorbell ring
C
someone knocked at the door
D
the doorbell rang loud
John hit_________. 
#93465
A
him on the head
B
him on his head
C
him in the head
D
him in his head
Volunteering gives you a chance____ lives, including your own.
#92258
A
change
B
changing
C
changed
D
to change