单项选择题

When is the main subject discussed in the text

A．Dealing designed the first green building in the U.S.
B．Energy shortage calls for buildings of new design.
C．Green building help save environment.
D．Green building is popular among people.
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单项选择题
The government has ______ the parents to work with teachers in the education of their children.
A．asked for
B．called for
C．looked for
D．paid for
单项选择题
--Whom do you want to see at the moment--The man ______ Mr. zhang.
A．called himself
B．you call
C．calling himself
D．is called
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