I know one of the things _____I was unsure about was _____ hard it would be to climb   this mountain.
#65979
A
that; how
B
what; how
C
which; what
D
/; what
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Keep practicing and you _____ your English.
#66108
A
improve
B
will improve
C
improved
D
were improving
The floor is so dirty .Would you please     ?
#59450
A
to mop up it
B
mop up it
C
to mop it up
D
mop it up
   I wish to pay a visit to Hongkong!
#66238
A
How do
B
What do
C
What
D
How
___some of the juice and perhaps you’ll like it. 
#65963
A
Trying
B
To try
C
Try
D
Having tried