答：①尽可能地不使用一次性用品；②延长物品的使用寿命；③包装盒纸在垃圾中比例很大，购物时减少对它们的使用。
9、物质的变化一般分为物理变化和化学变化。化学变化伴随的现象很多，最重要的特点是产生了新物质。物质发生化学变化的过程中一定发生了物理变化。
答：如蚂蚁、蝗虫、蚕蛾、蚜虫、蟋蟀、蝉、蝴蝶、蜜蜂、七星瓢虫等。
2、物质变化有快有慢，有些变化只改变了物质的形态、形状、大小，没有产生新的不同于原来的物质，我们把这类变化称为物理变化；有些变化产生了新的物质，我们把有新物质生成的变化称为化学变化。
2、你知道日食的形成过程吗？
15、在显微镜下，我们看到了叶细胞中的叶绿体，还看到了叶表皮上的气孔。
3、你知道月食的形成过程吗？
一、填空：第二单元物质的变化。
5、草蛉是蚜虫的天敌，七星瓢虫吃蚜虫，蜻蜓吃蚊子。六年级英语下册复习二测试卷。
班级___姓名___成绩___
听力部分（满分30分）
一．听录音，选出相符合的一项，并将选项填在题前的括号里。（每小题1分，共10分）
( )1. a. tallerb .tallc. doll
( )matterb .matchc. metter
( )noseb. rosec. goes
) 4. a. redb. readc. bread
( )boredb. ballc. sore
( )drewb. drawc .flew
) 7. a . watchb. watchedc. washed
) 8 . a . together b. weatherc. yesterday
) 9 . a . wednesday b. thursdayc. tuesday
) 10. a . windyb. cloudyc. sunny
二、听录音根据问句，选答语。（每个1分，共5分）
) 1. a. i’m 160cmb. i’m 21 years old. c. i’m 48kg.
) 2. a. i cleaned the room. b. i clean the room. c. i can clean the room.
） am am am five.
） blueb. it’s a bookc. it’s a rabbit
） often go by bus. b. i am going by bus. c、i went to school by bike
三、根据录音内容填写下列句子中所缺的单词，使句子完整。(每空只填一词)(7分)
1. hepictures yesterday.
2. i’m verybecause i failed the math test!
3. sarah has a fever, so shethe doctor at 8:00 this morning.
4some animals in the zoo.
5. liu yunher grandparents last
四．听录音，完成短文。（每空只填一词)(8分)
hello，i h**e a goodher name is lily. she is 160cm tall. she is _ than me.
she is 13， i’m 14. she is one yearthan me. shecollecting stamps.
this weekend，we are___to the postto buy stamps. we likestamps. we are very __
笔试部分（满分70分）
一．按要求写出下列单词的适当形式。(8分)
1. thin (比较级过去式缩写第三人称复数现在分词。
宾格过去式。
二．选择题。（10）
）1、 _monday we went to a restaurant. a. in b. on c. on d. in
） did you go thereb: i went by bicycle.
a .how b .what c. where d .when
)3. did you help them clean their house?
a yes , i didn’t b no, i did c yes, i did d no, i don’t
) desk is about 112 cm
a. big b. longer c. long d. bigger
)5. amyvery sad. what’s wrong __her ?
a. looks, withb. look, withc. looks , to d. look, to
)6 .did you __ping-pong last weekend?
a .playing b. play c. plays d. played
( )arms are longer than
)8 i like to __kites , i __kites yesterday
a fly , fly b flew , fly c fly , flew , flys
)9. mike __a headache, and the teacher __tired.
a. h**e, are c. has, are
)10. he is playing piano and she is playing football.
a. the; /bc. /the d. a; the
三．用所给词的适当形式填空。（6分）
1．i often __do) my homework in the evening. but yesterday evening, i __watch) tv.
mike __go)swimming?
the___twelve) is tree planting day.（植树节）
she isdraw) a picture now.
is taller than zhang peng. but zhang peng isstrong) than john.
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