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Polar bears live mostly on______ sea ice, which they use as ______platform for hunting seals.

A. a; a　　　　　　　　　 B. a; the　　　　　　　　 C. 不填; a　　　　　　　 D. the; 不填

She usually________creative imagination with intelligence to create some wonders.

A．connects 　　　　　　　　 B．joins

C．combines 　　　　　　　　D．a(chǎn)ssociates

It is always difficult being in a foreign country, __________if you don’t speak the language.

A.extremely　　　 B.naturally　　　 C.basically　　　 D.especially

They offered ______ prices for her paintings, which made her parents and teachers surprises but happy.

A.unbelievable　　 B.acceptable C.agreeable　　　 D.sociable

Sea water__________hundreds of chemicals,__________salt.?

A.contains;includes

B.contains;including?

C.includes;contains

D.includes;containing?

He insisted that the thief ______ to be sent to the police station.

A. refers　 B. refer　 C. referred　 D. referring

______ is quite entertaining to read these stories about strange and unusual facts.

　 A. This　　　 B. That　　　 C. It　　　　 D. What

Her advice _____.

A. proved useful 　 　B. was proved useful

C. proved usefully 　 D. proves usefully

Mr Smith,       of the      speech, started to read a novel.

A. tired; boring     B. tiring; boredn　 C. tired; bored      D. tiring; boring