unit 4 road safety
班级姓名学号___日期成绩， ,
一、用所给单词的适当形式填空。
we should look for a zebracross)first.
can see many traffic___light)on the road.
must __finish)his homework before dinner.
can cross the road with otherpeople).
nancy___wash)clothes now?
can draw this picture___easy).
shouldn’ttalk)loudly in the classroom.
bing didn’tplay)football on the road.
late .let’s runquick).
road.二、 按要求改写句子。
1. i got up late yesterday morning.(改为一般疑问句)
2. liu tao has some bad habits.(改为否定句)
3. we must listen to the teachers in the classroom.(对划线部分提问)
4. can i open the window?(作否定回答)
are some traffic lights here.(改为否定句)
5. you must keep your desk clean in the classroom.(对划线部分提问)
6. the woman gets up late.(改为一般疑问句)
7. there’s a lot of water in the glass.(改为同义句)
8. must helen go to see the doctor?(作否定回答)
can’t go to school because i’m sick.(对划线部分提问),
三、根据中文提示补全句子。
1.那只狮子不能从网里出来。
the lion could notthe net.
2.苏海总是把东西放得井井有条，并保持她的卧室干净整洁。
su hai always the thingsand keeps her bedroom clean and tidy.
3.玛丽一次吃少量的甜食。
mary eats a sweet food at a
4.你可以在人行道上等，和其他人一起过马路。
you can wait on theand cross the roadother people.
5.遵守规则，在道路上保持安全。
3、你知道哪些化学变化的事例呢？举出几个例子andon the road.
6.你应该保持你的课桌整洁。
you shouldyour
7.她通常洗脸很快。
she usually her
9. 你可以站起来，这样你妈妈就很容易看到你。
you canthen your mum can
10.这个城市有许多繁忙的马路。
5、草蛉是蚜虫的天敌，七星瓢虫吃蚜虫，蜻蜓吃蚊子。there arein the city.
22、光的传播速度是每秒钟30万千米，光年就是光在一年中所走过的距离，它是用来计量恒星间距离的单位。11.为什么现在公共汽车要停下来了？
答：①利用微生物的作用，我们可以生产酒、醋、酸奶、馒头和面包等食品。②土壤中的微生物可以分解动植物的尸体，使它们变成植物需要的营养素。
③在工业生产和医药卫生中也都离不开微生物。why the bus now？
12.你昨晚完成你的家庭作业了吗？
7、对于生活中的一些废弃物，我们可以从垃圾中**它们并重新加工利用。这样做不但能够减少垃圾的数量，而且能够节省大量的自然资源。 you your last night?
13.在英国，人们靠左行驶。
3、你知道月食的形成过程吗？ in the uk，people on theof the road.,
四、根据短文内容判断正（t）误（f）
traffic lights are the same in every country. there are always three lights: red, yellow and green.
red means”stop”. yellow means”wait” and green means”go”. in china, drivers drive on the right side of the road.
in the us, drivers drive on the right side too. in england and australia,however,drivers drive on the left side of the road. if you go by car, by bike or on foot, you must know the traffic rules.
)1. there are always three lights in every country: red,yellow and green.
15、经过有效处理的废水，可以排放到湖泊、河流和海洋中，也可以渗入地下。( 2. yellow lights mean”go”.
4、小苏打和白醋混合后，产生了一种新物质——二氧化碳气体，这种气体能使燃着的火焰熄灭，这样的变化属于化学变化。( china, drivers drive on the right side of the road.
)4. in the us, drivers drive on the left side of the road.
答：当月球运行到地球和太阳的中间，如果月球挡住了太阳射向地球的光，便发生日食。( 5.
if you go on foot, you don’t h**e to know the traffic rules.
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