单项选择题

--It's a long time () I saw you last.
--Yes, and what a pity it is since it will be a long time()we see each other again.

A．before; since
B．when; when
C．since; before
D．when; then

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单项选择题
China () the developing countries in the world.

A．is belonged
B．is belonging to
C．is belonged to
D．belongs to
单项选择题
() you have done might do harm () other people.

A．That; to
B．What; to
C．What; for
D．That; for
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