题目内容
10．Listen and choose the suitable pictures （听句子，选择与句子内容相对应的图片．每个句子读两遍．）请看第一组的三幅图片，听两个句子，完成第1至第2小题．
1．略2．略．
分析 略
解答 略
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| A． | knows | B． | is known | C． | was known | D． | will be known |
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（70）D
Mostly it's damming （筑坝） and global warming that make rivers dry．
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The Yellow River，the world's fifth longest river，watered some of the oldest farms on earth．But now it has a serious problem．（68）FIn most of the past 35years，it didn't reach the sea．
The Nile in Egypt，running 6，650km，is the longest river in the world．（69）C Now it is down to 2billion m'or so．Australia's Murray River reaches the sea only every other year．One fifth of America's Rio Grande has no water，either．
（70）D
Mostly it's damming （筑坝） and global warming that make rivers dry．
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Global warming is making things worse．Warmer weather takes water away．The glacier （冰川） are becoming smaller．（72）BGlobal warming has had certain effects on water sources （源头）．Droughts （干旱） happening around the world make people pay more attention to this fact．
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