Many scientists say that the world is getting hotter and hotter. If they are right, the ice at the North and South Pole will melt eventually. If this 26    , the sea will rise and

may cover most 27 all of Singapore. This will force everybody to move to a 28 country.

We know that the sun 29 the earth. The heat from the sun hits the 30 , and some of it goes 31 into the sky. However, factories and cars 32 a lot of carbon dioxide(二氧化碳）. When the gas rises into the sky，the heat from the sun can come 33 them but the heat from the ground cannot. It 34 near us in the sky and makes the 35 hotter and hotter every year.

Scientists call this the “greenhouse effect” because a greenhouse is a small glass 36 which is hot inside. It is used for 37 plants in cool countries. Many countries are 38 about the greenhouse effect. They are trying to stop factories and cars from sending 39 gases into the sky. Scientists are not sure when the world will 40 much

hotter. Some people say that the greenhouse effect has started already and has begun to affect the world’s weather.

(    )26.    A.    happens    B.    falls    C.    changes    D.    shows

(    )27.    A.    of    B.    or    C.    but    D.    and

(    )28.    A.    higher    B.    larger    C.    safer    D.    farther

(    )29.    A.    looks    B.    covers    C.    circles    D.    heats

(    )30.    A.    ground    B.    space    C.    forest    D.    plants

(    )31.    A.    out    B.    back    C.    off    D.    of

(    )32.    A.    make    B.    process    C.    produce    D.    form

(    )33.    A.    through    B.    over    C.    into    D.    toward

(    )34.    A.    hides    B.    continuevS    C.    follows    D.    stays

(    )35.    A.    cloud    B.    air    C.    season    D.    temperature

(    )36.    A.    building    B.    flat    C.    tool    D.    machine

(    )37.    A.    putting    B.    storing    C.    guarding    D.    growing

(    )38.    A.    excited    B.    disappointed C. worried    D.    pleased

(    )39.    A.    dangerous    B.    harmful    C.    heavy    D.    useful

(    )40.    A.    prove    B.    polish    C.    get    D.    stop

(    )25.    —Alice,you_on the phone.

—I’m coming. Thanks.

A. want    B.    are wanted    C.    are wanting    D.    have wanted

(    )24.    —What a nice    garden!

—So it is. It_every day.

A. is cleaning    B.    has cleaned    C. must clean    D.    is cleaned

(    )23.    —I won’t come    to    the party unless    Sue_,too.

—You mean if Sue comes you’ll come?

A. will invite    B.    invites    C.    invited    D.    is invited

(    )22.—Look! How dirty the river looks!

—So it is. Things will be better if people_throwing rubbish into it.

A. are stopped    B.    were stopped C. stopped    D.    will stop

(    )21. —Can you tell me how to make apple juice?

—Sure. Please watch carefully and you will see how it_.

A. is made    B.    is making    C.    makes    D.    will make

(    )20. —There’s too much    salt in the Chinese    diet.

—So there is. The WHO says only 1. 5    grams    of salt _ for    each    man every

day.

A. is needed    B.    needs    C.    will need    D.    has needed

(    )19. We will fly a kite as soon as your homework_.

A. has finished    B. finishes    C. will be    finished D. is finished

(    )18. Today，people light    the lanterns and    watch    them    _ the    sky    with    their

wishes.

A. deal with    B.    rise into    C.    show up    D.    send out

(    )17. After drying, they are fired at a very high heat and it_several weeks to

complete everything、

A. spends    B.    takes    C.    costs    D.    pays