【名词&注释】
工业废水(industrial wastewater)、造福人类(benefit mankind)
[单选题]水可以造福人类，但水被污染后却给人类造成灾难。为了防止水的污染，下列各项：①抑制水中所有动、植物的生长；②不任意排放工业废水；③禁止使用农药和化肥；④生活污水经过净化处理后再排放。其中可以采用的方法是
A. ①②
B. ②③
C. ①④
D. ②④
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举一反三：
[单选题]下列命题中，正确的是（ ）。
A. 若a·b>0，则a>0，b>0
B. 若a·b<0，则a<0，b<0
C. 若a·b＝0，则a＝0，且b＝0
D. 若a·b＝0，则a＝0，或b＝0
[单选题]29． The Browns tlunk that a small dog_________．
A. doesn-t need any room to keep ．
B. can help them watch their house
C. eats less food than a bigger one
D. usually has a beautiful name
[单选题]BThis is a photo (11) my family． (12) are my grandparents．Those are my (13) .This is my uncle (14) that is my aunt． This boy is my (15) ．He is my un-cle’s (16) ．(17) name is Ed． This girl (18) me．My name is Kate． I (19) twelve． I love (20) family．
B. for
C. of
D. on
E. to
[单选题]20．
A. them
B. their
C. their’s
D. their room
[单选题]What was the date yesterday ? _____.
A. It was Saturday
B. It was November 21st
C. It was cloudy
D. It was 2pm
[单选题]16．
A. much
B. many
C. a lot
D. lot of
[单选题]-Whenshallwegotothemuseum,thisafternoonortomorrowmorning?-_____isOK.I’mfreethesedays.
A. Both
B. All
C. Either
D. Neither
[单选题]AMany children feel that the most important people in their lives are their friends．They be- lieve that their family members don-t know them as well as their friends． In large families， it is quite often for brothers and sisters to fight with each other and then they can only go to their friends for some ideas．
A. Even when they are not with their friends， they usually spend a lot of time talking on the phone with their friends．This communication is very important to children’s growth， because friends can discuss some-thing， but it's difficult to discuss it with family members． However， most parents like to choose friends for their children Some parents even don-t allow their children to meet their good friends．
B. Who chooses your friends? What do your parents think of your friends?
D. Many children think ________ can understand them better．
E. friends
F. brothers
G. teachers
H. parents
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