John _____ knowledge of radio just by staying around the radio station.

　　A. caught on  B. worked up  C. took up  D. picked up

Comrade Li Dazhao, _____ librarian of Beijing University, was one of the founders of the Chinese Communist Party.

　　A. sometimes B. sometime  C. some time  D. some times

The climbers _____ their ambition by reaching the summit of the mountain.

　　A. obtained  B. sustained  C. maintained  D. realized

The lawyer was expected to _____ some proposals after reading all those documents.

　　A. come up with    B. put up with

　　C. look up to        D. keep up with

The illness from which Mary is suffering has now been _____ as hepatitis (肝炎).

　　A. diagnosed B. determined  C. deduced D. discovered

The town’s drinking-water _____ with prim chemicals at present.

A. contaminates         B. is contaminated     

  C. is being contaminated  D. has been contaminated

Before Tom left home, his mother kept telling him to  ____ his manners at the party.

A. mind   B. notice      C. watch     D. care

Having now __ 40, he feels that his football career is coming to an end.

A. gone    B. turned    C. become      D. entered

Is there a shop aroun ____ we can buy some toilet articles??

A. that 　      B. which  C. where　    D. what

The Titanic, the biggest ship of its day, ____ unsinkable, but it sank on its first voyage in 1912.

A. thought B. was thought  C. thought it D. was thought it