单项选择题

The main purpose of this text is to ________.

A．tell students of important schedule changes
B．tell students of new bus and library services
C．show the excellent services for students
D．ask students to renew their library cards

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单项选择题

We may infer that during the summer holidays ________.

A．few students will stay in the university
B．no breakfast will be served on weekends
C．the student newspaper will sell more copies
D．there will be a concert or a film each Wednesday

单项选择题

According to the text, what do we know about non-regular gamblers

A．Their bodies produce less endorphins during the game.
B．They don't consider losses in a game as reasonable near wins.
C．Their bodies have no reaction to beta blockers.
D．They have faster heart rates during the game.