1 . 某商场销售一种品牌服装，售价为500元，每天能够售出50件，商场为了减少库存，提高销售量，决定降价促销，经过调查，发现每降价50元，可多售出3件.若售价定为400元，则每天可售出_________件,若售价定为x元，则每天可售出_________件;

2 . 我国是最早使用负数的国家，东汉初，在我国著名的数学书《九章算术》中，明确提出了“正负术”．如果盈利20元记作“＋20元”，那么亏损30元记作（     ）

A．－30元

B．30元

C．50元

D．－50元

3 . The king's family often_______ dinner at 6:30. It's six o'clock now. The King's family_______ dinner and they look happy.

A．eat; is eating

B．eats; are eating

C．eats; is eating

D．eat; are eating

4 . 下列几种说法：①正整数和负整数的全体组成整数集合；②带“-”的数是负数；③0是绝对值最小的数；④两个数中，较大的那个数的绝对值较大．其中错误的有（     ）

A．1个

B．2个

C．3个

D．4个

5 . —        ,Jenny?
—Fine,thanks a lot. And you?

A．When is it going

B．How old are you

C．Where is it

D．How is it going

6 . Jim and Jane＿from England.

A．are

B．come

C．A or B

7 . We are at the library. Please _______ quiet.

A．do

B．be

C．can

D．are

8 . She usually watches TV in the evening. (就句子画线部分提问)
________ ________ she usually ________ in the evening?

9 . English is ________ useful subject. No one should give it up.

A．a

B．an

C．the

D．不填

10 . How many ________ does Mary want?

A．pens

B．bread

C．drink