(    )6.My life will be ___ better than it is now.

       A.more       B.a lot          C. very            D. too

(    )5.She always does her homework all _____.

       A.by oneself   B. by herself     C. by myself       D.by itself

(    )4.He is suffering ____a bad cold.

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

(    )3.The hole ____by the workers

A.    was filled up B.filled up     C.is fill up   D.was fill with

(   )2. A lot of people are used to ____in bed.

       A.read        B.reading        C.reads          D.read books

(   )1.He is an ______boy.

A.    eight years old B.eight ?year-old C.eight―years ?old D.eight―years  old

5、设轿车辆，则，解得，又，所以三种方案；

（1）轿车3辆，面包车7辆，日租金1370元

（2）轿车4辆，面包车6辆，日租金1460元

（3）轿车5辆，面包车5辆，日租金1550元，选择方案三

4、设该班名学生，，解得，因为都是整数，所以，答：略

3、等腰三角形或直角三角形

2、