We haven't settled the question of ______________ it is necessary for him to study abroad.
#73885
A
if
B
where
C
whether
D
that
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The old man often looked back on the past days ________ he worked hard to make a living.
#66803
A
which
B
when
C
where
D
that
A serious illness, ______ its nature, is almost always painful.
#67625
A
whatever
B
wherever
C
whenever
D
however
The road conditions there turned out to be very good, ___ was more than we could expect.
#71771
A
it
B
what
C
which
D
that
Along with the letter was his promise ________ he would visit me this coming Christmas.
#74016
A
which
B
that
C
what
D
whether