21、――Where is my ball? I remember I put it here yesterday．

――You       it in the wrong place．

A．must put                B．might put             C．should have put      D．might have put

20、Seeing the happy           of children playing in the park，I’m full of joy and confidence in the future of our country．

A．sight                    B．scene                   C．view                      D．sign

19、Children asked       they would go to the party       they were invited．

A．if；whether         B．that；if                C．whether；if            D．if；that

18、        by a greater demand of vegetables，farmers have built more green houses．

A．To drive                  B．Having driven         C．Being driven           D．Driven．

17、Before its first voyage，         that the ship Titanic was the most advanced and safest one in history．

       A．this was declared     B．they were declared C．it was declared       D．that declared

16、――Why was Peter so angry?

――        what Mary had said to him．

A．Because                  B．As                          C．Since                      D．Because of

15、――You’ve given us a wonderful Chinese dinner，Mrs. Wang．

――         ．

A．Oh，I’m afraid I didn’t cook very well               B．I’m glad you enjoyed it

C．Come again when you are free                               D．It’s not necessary for you to say so

14、No one told us that the meeting would be        if it was raining．

A．put down                      B．put off                    C．put on                    D．put out

13、Finding her car stolen，         ．

A．a policeman was asked to help                     B．the area was searched thoroughly

C．it was looked for everywhere                      D．she hurried to a policeman for help

12、――What shall we do if our suggestion is refused at the discussion?

――        ，we should carry it out all by ourselves．

A．As a matter of fact                                     B．In my opinion

C．As a result                                                 D．In addition