37、--Has your teacher returned from America yet?

--Yes, but he _______ here for only three days before his company sent him to Africa．

A．was           B．has been          C．will be          D．would be

36、He told us whether _________ a picnic was still under discussion．

A．to have           B．having           C．have          D．had

35、Ladies and gentlemen, please remain ________ until the plane has come to a complete stop．

A．seated             B．seating          C．to seat            D．seat

34、_______ many times, he finally understood it．

A．Taught          B．Teaching         C．Having taught           D．Having been taught

32、We don’t allow _______in the office．But you are allowed _____ in the rest room．

A．smoking; smoking                                     B．to smoke; to smoke

C．smoking; to smoke                                    D．to smoke; smoking

31、My family consider ____ a computer, which is considered ____ a great help in our work and study．

A．to buy; to be      B．buying; being          C．to buy; being       D．buying; to be

30、_______ important advice father gave us the other day!

A．What        B．What an            C．How a          D．How an

29、I don’t like the people who try to _____ you with how much money they’ve got．

A．impress             B．show           C．press          D．strengthen

28、–Mom, may I play the computer games for a while?

-- _________! Dad is in the study．

A．Help yourself．                                          B．It’s up to you．

C．Behave yourself．                                      D．Go ahead．