8. Put the following events in the right order.

a. Glaciers began to melt.　　　　　　　　 b. People burn coal ,oil and gas.　　

c. The greenhouse effect is growing.　　　 d. The earth is getting warmer and warme

e. The sea level is rising.　　　　　　　　 f. More CO₂ is produced.　　 　　

g. Many places are sinking into the sea.

A. d,f,b,c,a,e,g　　　　　　　 B. b,f,c,d,e,a,g　　　　 C. f,c,b,d,a,e,g　　　　 D. b,f,c,d,a,e,g

7. The author uses Tuvalu and Venice as examples in order to explain　　　 .

A. they are the first place sinking into the sea　

B. they are both sinking into the mud where they stand

C. they will disappear in the future

D. their trouble is caused by global warming

6. We can infer from the second paragraph that 　　　　.

A. Tuvalu is in danger of being swallowed up by the sea

B. all Tuvalu’s islands are about five meters above the sea level

C. drinking water in Tuvalu has been destroyed

D. Tuvalu is often flooded by storms and waves

4. Among the special advantages of walking, which one do you think is the most important? Why? (within 30 words)

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3. Please fill in the blank in the 2^nd paragraph with proper words or phrases. (within 10 words)

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2.　　　 Which sentence in the passage can be replaced by the following one?

Compared to running, more people can continue walking as a form of exercise.

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1.　　　 What’s the best title of the passage? (within 10 words)

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30．The fifth paragraph mainly tells us______．

A．how the system works

B．how the electricity be converted into heat

C．the function of the ambitious technology

29．Which of the following statements is TRUE?

A．The laser does harm to people's health．

B．The gadgets like audio speakers have been shown at the International Consumer Electronics Show this week．

C．The word 'recharge' has been deleted from the English dictionary．

D．The technology Can also save energy because it would not work when unnecessary．