35、Something must be done to prevent factories       poisonous gases so as to keep the city       .

       A．sending out; from polluting

       B．send out, polluting

       C．from sending out; from polluting

       D．sending out; from being polluted

34、One of the men held the view       the book said was right.

       A．that what             B．what that             C．that                     D．whether

33、It was cold, but the trip was       and people were enjoying themselves.

       A．cheerful              B．glad                    C．pleasant               D．joyful

32、―I can’t find Fred. Where did you last see him this morning?

―It was in the office       he worked.

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

31、When you       a lady, what should you say?

       A．knocked on                                         B．knocked into

       C．knocked down                                    D．knocked out

30、Happily for John’s mother, he is working harder to       lost time.

       A．make up              B．keep up with        C．catch up with      D．make use of

29、The young man was walking, with his arms       across his shoulders.

       A．fold                    B．folding                C．folded                 D．to fold

28、Harry is second       speed       none as a famous athlete.

       A．in; to                   B．at; with               C．at; to                   D．in; with

27、He was careless: Such mistakes       .

       A．could be avoided                                  B．could avoid

       C．could have avoided                              D．could have been avioded

26、You must explain       how they succeeded       the experiment.

       A．of us; to              B．at us; at               C．to us; in              D．for us; in