When you communicate with people, it is not unusual to find yourself in a situation ____ you have to politely decline an offer.
#70145
A
where
B
which
C
what
D
why
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As a new diplomat, he often thinks of_____- he can react more appropriately on such occasions.
#74266
A
what
B
which
C
that
D
how
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