单项选择题

It is possible to predict how much energy and water a building will consume, how much （）will be needed.

A．matter
B．things
C．material
D．substance

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单项选择题

According to the article practically all animals have some sense of（）

A．direction
B．hearing
C．vibration
D．both B and C

单项选择题

According to Mr. Daniel’s e-mail, what is he concerned about（）

A．Living expenses
B．His salary
C．Commuting to work
D．His vacation days

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