以前人们并不知道大气压强的存在，17世纪中期，德国马德堡市的市长公开演示了著名的__________实验，才使人们确信大气压强的存在．1644年，科学家　　  　　首先用实验测定了大气压强的值，通常把相当于　  　毫米水银柱所产生的压强叫做1个标准大气压．

完成句子 （9分）

1. 这些钱是用来帮助无家可归的人。

The money                                                .

2.你应该健康地饮食, 否则你的健康可能会有问题。

You should eat healthily, or you will                               .

3. 在二十分钟之内完成这件工作对你来说是不可能的。

It is                                the work within twenty minutes.

4.他很固执，从不轻易放弃。

He is stubborn and                                          .

5.如果你要外出，你首先要注意天气。

If you need to go out, you should first ___________________________________.

6.你越仔细，你犯的错误将越少。

The more careful you are, _______________________________________.

 

阅读下面短文，掌握其大意

　　Sam likes fish(鱼) very much. He often buys fish in the shop and takes it home. But when(当……的时候) his wife(妻子) sees the fish. She says to herself(她自己). “Good! Now I can ask my friends to have lunch, and we can eat the fish. They like fish very much.”

　　So(所以) when Sam comes home in the evening, the fish is not there and his wife always(总是) says. “Oh, your cat eats it.” And she gives Sam some bread for his supper. Sam gets very angry(生气). He takes the cat and his wife to the shop near his house and weighs(称) the cat. Them he turns to his wife and says. “My fish weighs one kilo(公斤). This cat weighs one, too. My fish is here, you see. Then, where is my cat!”

根据短文判断正误，正确写“T”，错误写“F”．

1．Sam likes eating fish very much.

(　　)

2．His cat often eats the fish.

(　　)

3．His wife and her friends often eat the fish.

(　　)

4．At last(最后), his cat runs away. (跑了)

(　　)

5．In fact(事实上) Sam is angry with his wife.

(　　)