单项选择题

(On his way) to school yesterday morning, Prof. Wang (came across) an old friend and (stopped talking) with him for (quite a while).（）

A. On his way
B. came across
C. stopped talking
D. quite a while

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单项选择题

In regard to the production of goods in greater quantities, the author states that（）.

A．the price of the goods should drop
B．the quality of the goods should improve
C．the price and the quality should both rise
D．the quality and the price should both drop

单项选择题

The North Pole is surrounded by land, while the South Pole is surrounded by the Antarctic Ocean. So scientists thought that （）.

A．most of the ice melted in the Northern hemisphere
B．most of the ice melted in the Southern hemisphere
C．The North Pole is colder than the South Pole
D．The South Pole is colder than the North Pole