______ on ten years of observation and study, the theory shows that every one dreams every night, whether they realized it or not.
#90335
A
Basing
B
Based
C
Being based
D
Having based
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It has been raining for nearly one week，________ the river rise a lot.
#88273
A
making
B
makes
C
made
D
to make
Do you have any difficulty ________?
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A
on listening
B
to listening
C
for listening
D
in listening
Harrison Ford is thought to be one of the few movie stars ____ as a carpenter before.
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A
to work
B
to be working
C
to have worked
D
to have been working
Without Ms Smith ________ your way, I bet you won’t find their secret living place.
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A
leading
B
will lead
C
to lead
D
to be leading
With a lot of things ， John will have a difficult time.
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A
to deal with
B
deal with
C
dealing with
D
dealt with