1、Scientists have to work hard to keep _____ with modern discoveries and developments.

　　A.company　　B.track　　C.touch　　D.pace

　　2、He didn't _____ what I read because his mind was on something else.

　　A.hold on　　B.catch on　　C.take in　　D.get over

　　3、We made plans for a visit but _____ difficulties with the car prevented it.

　　A.consequent　　B.subordinate　　C.substantial　　D.subsequent

　　4、arrogance and pride are similar in meaning, but there is _____ difference between them.

　　A.a submerged　　B.an indecisive　　C.an indistinct　　D.a subtle

　　5、This watch is _____ to all the other watches on the market.

　　A.superior　　B.advantageous　　C.super　　D.beneficial

　参考答案：

　　1、D　2、C　3、D　4、D　5、A