单项选择题

______ around our city, the foreigners were invited to have attend an evening party.

A．Have shown
B．Having been shown
C．Been shown
D．Being showing
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Have you ever spent a lot of time ______ for a perfect Christmas present
A．search
B．to search
C．searching
D．searched
单项选择题
You'd better deal with the problem while it is still ______.
A．managed
B．manageable
C．managing
D．management
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