It is not easy to learn English well, but if you _______, you will succeed in the end

When we read, it is NOT advisable that we ____________________

We can’t judge a person by his or her _______

How can we best_______ our limited resources

But just how long it takes for the heat to flow out will depend on how well your home is ________ and draught proofed

When we read, it is NOT advisable that we ____________________

If our parents do everything for us children, we won't learn to depend on______

How much one enjoys himself travelling depends largely on_____he goes with，whether his friends or relatives．

17．_________they may not succeed，they will try their best．

Water is the __46___ of all the things we eat and drink . Not many people understand this but __47____ quite true . The human body can go without ___48___ for a long time . We’ve got many examples for this . Yet two __49___ three days without water can usually make people __50____ . Man can’t live __51____ water .Many people don’t understand how ___52__ water the human body needs __53___ work well , and many people , especially young people , do not drink enough , ___54__ in very hot weather . Our body has mostly water , about 65% to 75% . That is to say about two thirds of our body is water . When we do sports , some of the water will get away from our body . __55 _ we don’t drink some water , we won’t have enough water． And if we don’t have enough water , we’ll feel tired and many of us will get ill . So you know how important water is to us .46.___________( )46.

5．We can______ books _______bookstore(书店)．