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．

27、---Has your father returned from Africa yet?

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

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

26、Tell the children ______ there not to make so much noise．

A．play           B．played         C．playing            D．to play