16. They will concentrate more on their clothes than their studies, (concentrate on)

造句:Lucy不能长时间专心读一本书。_

(    )15. The children are too_.    They are not_enough    to    concentrate    on

their studies.

A. careful； wild    B.    calm； careful

C. calm； wild    D.    wild； calm

(    )14.    I    can’t choose_of    jeans    to    buy.    They all look cool.

A. what rule    B.    which    jean    C. which pair    D.    what    set

(    )13. Everyone needs to have_eight    hours’ sleep at night.

A. at last    B.    at most

C. at once    D.    at least

(    )12. She doesn’t know which pair of jeans to buy, both of them look_her.

A. well on    B.    nice on

C. good at    D.    beautiful with

(    )11. —I think teenagers should be allowed to go out with their friends in the evening.

—_.    It’s    not    safe    enough.

A. I agree    B.    I think so

C. I don’t know    D.    I disagree

9. spend time on sth._  10.    work at night_

7. have nothing against_ 8.    be serious about_

5. have a chance to_ 6.    move out_

3. a good experience_ 4.    at least_