He had hardly reached home _______ an unexpected guest came to visit him. 
#92306
A
then
B
when
C
the moment
D
than
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I kept looking at the man, wondering _______.
#93460
A
whether I have seen him before
B
whether I had seen him before
C
that I had seen him before
D
when I saw him before
______ Marx's works with Engels', and you'll find many differences.
#92685
A
Comparing
B
Compare
C
To compare
D
If you compare