20、Oil prices have risen by 32 percent since the start of the year, __________ a record US $ 57．65 a barrel on April 4．

A．have reached                                    B．reaching

C．to reach                                       D．to be reaching

19、________the people have become masters of their country __________science can really serve the people．

A．It is only then; that                            B．It was that; when

C．It is only when; that                            D．It was when; then

18、All the doctors in the hospital insisted that he _____badly wounded and that he ______at once．

A．should be; be operated on            B．were; must be operated on

C．was; should be operated                D．was; be operated on

17、-----The experiment was not successful．

-----I suggest you _____again．

A．try         B．tried         C．will try            D．would try

16、What ______surprised them was that the village was _________of mud houses．

A．most; mostly                                           B．mostly; almost

C．a(chǎn)lmost; mostly                                         D．mostly; most

15、When tomatoes were brought to Europe from America, people who bought them thought they ______red apples．

A．had bought         B．bought         C．were buying           D．would buy

14、-----Would you like to watch TV or surf the Internet after supper?

------__________．

A．I don’t know                                             B．Well, I’d like to 

C．Neither of them                                         D．Well, I’d prefer watching TV

13、_______I studied harder, I could have passed examination．

A．Had            B．Were        C．Should         D．Did

12、Compasses are not often used in our maths class．However, _______ is often used．

A．a(chǎn) compass                                              B．a(chǎn) pair of compass 

C．a(chǎn) pair of compasses                                D．compass．

11、These words are jumbled up and don’t _________．

A．make use                                        B．make sense

C．make up                                       D．make sense of