【推荐1】I woke up at midnight to find a swimming pool in my tent . The temperature was close to ____. I had to spend the rest of the night trembling in the only dry part of my tent.

A．boiling

B．normal

C．average

D．freezing

【推荐2】There is growing concern that twenty years from now, the ________ American family won’t be able to afford to send their children to college.

A．average

B．typical

C．extraordinary

D．usual

【推荐2】New York City’s three library systems closed their doors at 3:30 pm Wednesday, a few hours earlier than ________, because of deteriorating air quality conditions, according to spokeswomen for the agencies.

A．average

B．common

C．normal

D．ordinary

【推荐2】The _____ income of the common people has been greatly increased in the past thirty years _____ the reform and opening-up policy in China.

A．regular; because	B．usual; thanks to
C．normal; on an account of	D．annual; owing to

【推荐2】We will begin a series of ________ to appeal to the public to contribute to environmentally ________ development.

A．documentaries; adjustable	B．presentations; available
C．institutions; flexible	D．campaigns; sustainable