18、Nowadays，an increase in the price of drugs has _____ the rising cost of medical care，about which the patients are complaining bitterly．

A．relied on           B．kept up        C．resulted from       D．contributed to

17、If the new invention had been _____ the working conditions of the coal miners，there wouldn’t have been such a serious accident．

A．a(chǎn)pplying to improve                      B．a(chǎn)pplied to improving

C．a(chǎn)pplied to improve                       D．a(chǎn)pply to improving

16、The old sailor-found the compass _____ in his sailing across the Atlantic alone．

A．a(chǎn) great value        B．great value         C．great valuable          D．of valuable

15、In order to protect the boy's eyes，his parents have fixed an _____ desk lamp for him．

A．a(chǎn)vailable           B．a(chǎn)djustable          C．a(chǎn)ccessible           D．a(chǎn)cceptable

14、--How much do you know about the 3D film technology?

--A little．Not until _____ the hot movie Avatar _____ something about it．

A．did I see；did I begin to learn            B．I saw；I began to learn

C．I saw；did I begin to learn                      D．did I see；I began to learn

13、_____ over many years，the underground system is now able to transport millions of people effectively．

A．Being developed                                       B．Developing

C．To develop                                            D．Having been developed

12、Misunderstandings _____ from lack of social communication，unless _____ properly may lead to serious problems．

A．a(chǎn)risen；handling                         B．a(chǎn)rising；handled

C．rising；handled                         D．risen；handling

11、Do you think that bridge _____ 2，000 meters long? It doesn’t appear_____ long．

A．measures；that                         B．is measured；so

C．is measured；such                      D．measures；much

10、Although our headmaster didn’t mention any names，everyone knew who he was_____

A．referring to       B．turning to          C．belonging to        D．sticking to

9、-- Tom was late for class this morning again．

-- You know，_____

A．a(chǎn)ll good things come to an end

B．a(chǎn)n old dog cannot change its way of barking

C．honesty is never too much practiced

D．a(chǎn) work ill done must be twice done