There is a mountain_____the top is always covered with snow. 
#73714
A
whos
B
of which
C
its
D
that 
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I will stay at home and read books if it _______ tomorrow.
#41356
A
is raining
B
rains
C
rain
D
will rain
 _________ you may have, you should gather your courage to face the challenge.
#67618
A
Whatever serious a problem
B
However serious a problem
C
However a serious problem
D
No matter how a serious problem
_____his father had come, his face lit up.
#74080
A
Having learned
B
When he learned
C
Heating
D
When learning