---Miss Hu, I have trouble __________ grammar and __________ the text. 
#55875
A
with; to understand
B
on; in understanding
C
with; understanding
D
on; to understand
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We need __________ at the hotel for __________ because of the heavy snow. 
#56083
A
stay; short stay
B
staying; a short stay
C
to stay; short stay
D
to stay; a short stay
It’s important __________. 
#63147
A
for us to learn English well
B
to us to learn English well
C
for us learning English well
D
of us to learn English well