单项选择题

--Your city looks beautiful!--Yes. Lots of trees and grass ______ last year.

A． were planted
B． have been planted
C． planted
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单项选择题
Summer is ______ season of the year.
A． hotter
B． the coldest
C． the hottest
单项选择题
Do you know that woman ______ black
A． with
B． on
C． in
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