Tom finds _________ difficult to learn Chinese well.
#55814
A
it
B
that
C
this
D
him
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I think____________ necessary _____________ to take more exercise.
#55774
A
it, for Jim and me
B
it’s, to Jim and me
C
that , for Jim and I
D
that’s, to Jim and me
_____a cat.  We do not know_____ name.      
#55860
A
It is, its
B
Its, it is
C
It is, It is
D
It is, is