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The most important drink is water. Not many people understand this but it is quite t 1 . People can l 2 for a long time without food, but they will die if two or three days w 3 water. In h 2 weather, many people do not drink e 5 water, because they don’t know how much water they n 6 . After t 7 exercise, people need more water.
The water in man’s body is m 8 more than other matters(物质). We’d better have enough water, or we may get i 9 . Water is n 10 to all the living things. There will be no l 11 if there is no water.
So we must save water and don’t w 12 water.
The most important drink is water. Not many people understand this but it is quite t 1 . People can l 2 for a long time without food, but they will die if two or three days w 3 water. In h 2 weather, many people do not drink e 5 water, because they don’t know how much water they n 6 . After t 7 exercise, people need more water.
The water in man’s body is m 8 more than other matters(物质). We’d better have enough water, or we may get i 9 . Water is n 10 to all the living things. There will be no l 11 if there is no water.
So we must save water and don’t w 12 water. 查看习题详情和答案>>
2. No matter how hard it is, don't g_________ u__________ (放弃) studying English.
3. These are facts that are u_________ t_________ (为某人不熟悉的) every schoolboys.
4. She has learned a________ m_________ a_________ (多达) 3000 English words already.
5. I learn English b_________ m_________ (靠我自己) over the radio.
earlier in my country.
7. In Colombia, people are p__________ (to a fair degree; moderately) relaxed about time.
8. S________ (to use up or put out) time with family and friends is very important in Colombia.
9. We never visit a friend's house without c__________ (an inner urge) first.
10. In Switzerland, it's very i___________ (strongly affecting the course of events) to be on time.
The world is nor only hungry，but it is also t 1 for water．This may seem strange to you，since nearly 70％of the earth is c 2 with water：But about 97％of this huge amount is sea water，or salt water．Man can only drink and use the other 3％——the fresh water from rivers，lakes，
underground，and other sources. Even w 3 ，some of it has been p 4 ．Now our need for water is i 5 -almost day by day．We must take steps to solve this prob1em，or we can’t a 6 a worldwide water shortage later on．
We all have to learn how to s 7 water．One of the first steps is to develop ways of reusing it．
Today in most large cities，water is used only o 8 and then sent out into a sewer system(下水道)．But it is possible to get used water to a purifying(净化)factory．There it can be purified so t9 it can be used again．
The world’s water shortage is a big p10 for humans．We must save every drop of water and keep our rivers and lakes clean．
查看习题详情和答案>>
is L 4 .What c 5 is the flag? It's red, white and b 6 .The colour of the flag is d 7 from China's, but
It's the s 8 as the flag of the U.S. Do you know the U.K. has a king or a queen? Yes, t 9 live in palaces,
Now they l 10 in Buckingham Palace in London.