单项选择题

A．Bicycles and cars.
B．Building codes.
C．Energy conservation.
D．New housing construction.
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单项选择题
A．The centre has just opened.B．He’s looking forward to using the centre.C．The door to the fitness centre is locked.D．There are long lines to get into the centre.
A．The centre has just opened.
B．He’s looking forward to using the centre.
C．The door to the fitness centre is locked.
D．There are long lines to get into the centre.
单项选择题
According to the passage, when small children were asked to count a pile of red and blue pencils they ______.
A．counted the number of pencils of each color
B．guessed at the total number of pencils
C．counted only the pencils of their favorite color
D．subtracted the number of red pencils from the number of blue pencils
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