3. 一根木料第一次截去$\frac{3}{10}$m，第二次截去的比第一次多$\frac{1}{4}$m，两次共截去木料()m。

A.$\frac{17}{20}$
B.$\frac{11}{20}$
C.$\frac{3}{20}$
D.$\frac{1}{20}$

A

4.把一个长12厘米、宽6厘米、高3厘米的长方体木块削成一个最大的正方体，削去部分的体积是()立方厘米。

A.27
B.216
C.189
D.54

C

三、解决问题。
一个长方体容器(容器厚度忽略不计)长28厘米,宽25厘米,高50厘米,容器中水深15厘米。将一个底面面积为200平方厘米、高40厘米的长方体铁块竖直放入容器中,放入铁块后容器中的水深多少厘米？

21厘米

()1. Do you buy flowers your mum?

A.for
B.to
C.off

A

()2. We often the office.

A.cleans
B.cleaning
C.clean

C

()3. You should wash hands eating.

A.before
B.to
C.with

A

()4. Doudou walked for the time.

A.first
B.one
C.two

A

()5. They shouldn't drink cola.

A.too much
B.too many
C.much too

A

二、阅读短文,选择最佳的答案。
Kudy is not feeling well these days. She often gets sick and is always not happy. She just comes to a 1 school. So she has no friends now. Also, she has a lot of 2 after school. She often 3 homework until late at night. Her family doctor tells her not to be too nervous(紧张) or worried. He says she should take part in more school activities. This can help her 4 new friends. For her homework, she can talk to her teachers. They will 5 her some good advice.
()1. A. wonderful B. new C. happy
()2. A. homework B. housework C. chores
()3. A. makes B. thinks C. does
()4. A. made B. make C. makes
()5. A. get B. give C. eat

1.B 2.A 3.C 4.B 5.B