单项选择题

______ planning on traveling to Liberia should contact the embassy to determine whether it is safe.

A．Them
B．Those
C．That
D．These
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单项选择题
Sales of our special summer product line ______ at the end of the month.
A．began
B．begins
C．has begun
D．will begin
单项选择题
The homeless shelter ______ receives more gifts and donations around the holiday period than at any other time of the year.
A．recently
B．simultaneously
C．reasonably
D．typically
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