1 . Writers often coupled narration with other techniques to develop ideas and support opinions that otherwise________ abstract, unclear, or unconvincing.

A．may remain

B．could remain

C．must have remained

D．might have remained

2 . In some cities of North China, the noise pollution is as pronounced as that in Tokyo.

A．contemptuous

B．contagious

C．conspicuous

D．presumptuous

3 . Ultimately, Italy enjoyed its profound benefits from the pioneering role in Renaissance(文艺复兴).

A．Eventually

B．Suspiciously

C．Ridiculously

D．Miraculously

4 . Lincoln, former president of the United States, is a conspicuous example of a poor boy who succeeded.

A．ridiculous

B．obstinate

C．permanent

D．manifest

5 . Poland is somewhat a new destination for Chinese tourists, and Warsaw, the capital city, is an important business center with _____ night life and elegant dining.

A．sophisticated

B．controversial

C．homogeneous

D．solitary

6 . When workers are organized in trade unions, employers find it hard to lay them ______.

A．off

B．aside

C．out

D．down

7 . It is naive to expect that any society can resolve all the social problems it is faced with ______ .

A．for long

B．in and out

C．once for all

D．by nature

8 . When the engine would not start, the mechanic inspected all the parts to find what was at ______.

A．wrong

B．trouble

C．fault

D．difficulty

9 . The Timber rattlesnake is now on the endangered species list, and is extinct in two eastern states in which it once ______.

A．thrived

B．swelled

C．prospered

D．flourished

10 . The director of the research institute came in person to ______ that everything was all right.

A．make out

B．make sure

C．make clear

D．make up