单项选择题

(Prior to) our (conference), the (executive) director had requested that everyone (was) well prepared.

A．Prior to
B．conference
C．executive
D．was
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单项选择题
The only thing (what) really matters (to) the children (is) (how soon) they can return to their uncle's farm.
A．what
B．to
C．is
D．how soon
单项选择题
I (would go to) visit that beautiful lake (but) I (couldn't) get (in touch) with you while I was in Boston.
A．would go to
B．but
C．couldn't
D．in touch
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