单项选择题

A．Because it changes color in a regular 24-hour rhythm.
B．Because it changes color in response to the sun’’s rays.
C．Because it constantly changes color.
D．Because it changes color every hour.
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单项选择题
A．What the man’’s plans are for tonight.B．Why the man does not want to play tennis.C．Why they do not have time to play tennis after class today.D．What time they can meet in the library.
A．What the man’’s plans are for tonight.
B．Why the man does not want to play tennis.
C．Why they do not have time to play tennis after class today.
D．What time they can meet in the library.
单项选择题
A．She’’d like to take her book back.B．She’’d like to borrow a book.C．She’’d like to know whether she could order a book that has come in.D．She’’d like to know whether a book that she’’d ordered has come in.
A．She’’d like to take her book back.
B．She’’d like to borrow a book.
C．She’’d like to know whether she could order a book that has come in.
D．She’’d like to know whether a book that she’’d ordered has come in.
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