Desertification，the name for ______ happens when farmable land is turned into desert，is a growing world problem.
#72906
A
which
B
where
C
what
D
How
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He talked a lot about things and persons ________they remembered in the school.
#73847
A
which
B
that
C
whom
D
what
___ he was ill, I was expected to take his place greatly surprised me for I didn't have much working experience.
#73288
A
If
B
That if
C
That
D
If that
Was it at the beginning _____ you made the promise ____ you would do all to help make it?
#69128
A
that; that
B
when; that
C
that; when
D
when; when