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

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

A．though

B．for

C．but

D．so

答案

解析

for在此引出表示原因的并列分句。

举一反三

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

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(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

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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

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(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

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(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

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