34．Half of the students in our class _________girls

    A．is                  B．am                C．are               D．were

33．Thank you for___________

    A．help me                 B．to help me           C．helping me         D．helped me

    A．billions             B．billion of           C．13 billions         D．1．3 billion.

32．There are over _________people in China now:

31．The boy named Tom is ________ to go to school.

    A．old enough          B．enough young        C．enough old         D．young enough

30．The teacher stops the boy from __________basketball.

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

29．The books are made ________ trees, and we can use trees in many different ways.

    A．of                 B．from              C．into             D．on

28．You should wear a hat to protect yourself _________ the sun.

    A．of                 B．to                 C．in               D．from

27．He _______ his homework this time yesterday.

    A．did                 B．was doing           C．does               D．has done

26．―Would you please _______a flower bud for me?

     ―With pleasure. （我很乐意）

    A．drawing            B．draw              C．to draw           D．drew