Make up homework problems．,Do research in the library．,-找考题网

单项选择题

A．Make up homework problems.
B．Do research in the library.
C．Teach an introductory economics course.
D．Grade homework sets.

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单项选择题From the author’’s description, we can conclude that Mrs. Brown had made very detailed arrangements for the picnic.

A．Y
B．N
C．NG

单项选择题A．When descending from a higher position.B．When tailing to go after its food.C．When propelling itself towards its food.D．When being taken by tides and currents.

A．When descending from a higher position.
B．When tailing to go after its food.
C．When propelling itself towards its food.
D．When being taken by tides and currents.

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