单项选择题

Having a trip abroad is certainly good for the old couple, but it remains ______whether they will enjoy it.

A．to see
B．to be seen
C．seeing
D．seen
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单项选择题
—Don't forget to come to my birthday party tomorrow.
A．I don't
B．I won't
C．I can't
D．I haven't
单项选择题
It is said in Australia there is mom land than the government knows ______.
A．it what to do with
B．what to do it with
C．what to do with it
D．to do what with it
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