(2013·新课标Ⅰ，32)There's no way of knowing why one man makes an important discovery________another man，also intelligent，fails.

A．since

B．if

C．as

D．while

He found it increasingly difficult to read，________ his eyesight was beginning to fail.

A．though

B．for

C．but

D．so

The number of the employees has grown from 1,000 to 1,200.This means it has risen ________ 20 percent.

A．at

B．by

C．to

D．with

(2012·辽宁)The newcomer went to the library the other day and searched for ________ he could find about Mark Twain.

A．wherever	B．however
C．whatever	D．whichever

I'm afraid he's more of a talker than a doer，which is ________ he never finishes anything.(2011·山东)

A．that

B．when

C．where

D．why

(2013·湖北，21)Poetry written from the________of the urban youth tends to reveal their anxiety over a lack of sense of belonging.

A．perspective	B．priority
C．participation	D．privilege

(2013·湖北，22)Carbon dioxide, which makes a________between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.

A．difference	B．comparison
C．connection	D．barrier

(2013·江苏，33)With inspiration from other food cultures，American food culture can take a________for the better.

A．share

B．chance

C．turn

D．lead

(2013·辽宁，23)The accident caused some________to my car，but it's nothing serious.

A．harm

B．injury

C．ruin

D．damage

(2013·天津，7)While she was in Paris，she developed a ________for fine art.

A．way

B．relation

C．taste

D．habit