31.Weeks ____ before anyone was arrested in connection with the bank robbery.

　　A) terminated

　　B) elapsed

　　C) overlapped

　　D) expired

　　32.In order to prevent stress from being set up in the metal,expansion joints are fitted which ____ the stress by allowing the pipe to expand or contract freely.

　　A) relieve

　　B) reconcile

　　C) reclaim

　　D) rectify

　　33.How much of your country's electrical supply is ____ from water power?

　　A) deduced

　　B) detached

　　C) derived

　　D) declined

　　34.She had recently left a job and had helped herself to copies of the company's client data,which she intended to ____ in starting her own business.

　　A) dwell on

　　B) come upon

　　C) base on

　　D) draw upon

　　35.The glass vessels should be handled most carefully since they are ____.

　　A) intricate

　　B) fragile

　　C) subtle

　　D) crisp

　　36.Hill slopes are cleared of forests to make way for crops, but this only ____ the crisis.

　　A) accelerates

　　B) prevails

　　C) ascends

　　D) precedes

　　37.He blew out the candle and ____ his way to the door.

　　A) converged

　　B) groped

　　C) strove

　　D) wrenched

　　38.Often such arguments have the effect of ____ rather than clarifying the issues involved.

　　A) obscuring

　　B) prejudicing

　　C) tackling

　　D) blocking

　　39.I found it difficult to ____ my career ambitions with the need to bring up my children.

　　A) consolidate

　　B) intensify

　　C) amend

　　D) reconcile

　　40.It is fortunate for the old couple that their son's career goals and their wishes for him ____.

　　A) coincide

　　B) collaborate

　　C) comply

　　D) conform