题目内容
【题目】完成句子
根据汉语提示完成句子,一空一词。
【1】 如果你想学好英语,就不要怕犯错。
If you want to learn English well, don’t be afraid of .
【2】我母亲总是担心我的成绩,
My mother always_______ ________my grades.
【3】我们教室每天必须打扫三次
Our classroom must________ ________three times a day.
【4】我们每天使用筷子,它们是用木材做的,
We use chopsticks every day.They are________ _________wood..
【5】你知道茶、世界上最受欢迎的饮料,是被偶然发明的吗?
Do you know that tea,the most popular drink was invented_______ ________?
【答案】
【1】making mistakes
【2】worries about
【3】be cleaned
【4】made of
【5】by accident
【解析】
试题分析:
【1】此题考查固定短语make mistsakes犯错误,介词后用动名词,故填making mistakes。
【2】此题考查固定短语worry about担心,故填worries about。
【3】此题考查被动语态,故填be cleaned。
【4】此题考查固定短语be made of由……制造而成,故填made of。
【5】此题考查固定短语by accident意外,故填by accident。
【题目】
Below is a description of a single scientific experiment. It shows us how iron reacts (反应) with air and with water. Aim: To find out if iron rusts(生锈) (a) in dry air; (b) in water that has no air in it (air-free water) ; (c) in ordinary water. Materials: Some clean iron nails (铁钉) ; test tubes(试管); test tube holder; cotton wool; oil; Bunsen burner. | |
Iron in dry air Method (1) Put some iron nails at the bottom of a test tube. (2) Push some cotton wool down the tube. (3) Leave the tube for one week. Result After one week, the nails have not rusted. Conclusion Iron does not rust in dry air. | (4) Add some oil to the water. (This will keep air out of the water.) (5) Leave the tube for one week. Result The nails do not rust in the tube with air-free water. Conculsion Iron does not rust in air-free water. |
Iron in ordinary water Method (1) Half –fill a test tube with water and add two or three clean nails. (2) Leave the tube for one week. Result The nails rust in the tube with ordinary water. Conclusion Iron rusts in ordinary water. (238 words) | |
Iron in air-free water Method (1) Half-fill a test tube with water. (2) Boil the water for three minutes. (This makes surethere is no air in the water.) (3) Put two or three clean nails in the water. | |
【1】In the first part of the experiment the cotton wool is most probably used to ____.
A. keep the air dry B. keep the tube wet
C. make the nails rust D. keep the tube clean
【2】What are necessary steps to make sure the water in the tube is air-free?
① Leave half a tube of water in it.
② Boil the water for some time.
③ Put some clean iron nails in the tube.
④ Add some oil to the water.
A. ①② B. ①③ C. ②③ D. ②④
【3】We can conclude from the experiment that only ____ makes iron rusty.
A. dry air B. cotton wool
C. ordinary water D. air-free water