A Lesson in a Lab
酸對金屬起什么反應？
⑤what was her reaction to the news?
她對這消息的反應如何？
【例句探源】
5.—how did you react________your father’s suggestion?
—i reacted strongly________it.
a.on；to b.on；with
c.against；with d.to；against
解析：選d。react with“與……發生反應”；react to“對……的反應”；react against“反對”。句意：“你對你父親的建議有何反應？”“我堅決反對。”
【即境活用】
⑤ add...to... 把……加到……
(回歸課本p45)add some oil to the water.this will keep air out of the water.
在水中加些油。這樣做可防止空氣進入水中。
【歸納總結】
add v.加；繼續說；補充說
add to增加；增添
add up把……加起來
add up to合計達；結果是
addition n.加；(數)加法；增加
in addition另外
in addition to除……之外
【例句探源】
①please add some sugar to the bread.
請在面包上加些糖。
②three added to four makes seven.三加四等于七。
③fireworks added to the attraction of the festival night.
煙花使節日之夜更具吸引力。
④add up all the figures and find out what they add up to.
把這些數字加起來，弄清楚總計是多少。
6.the total cost of their trip to america________
$ 8,000.
a.added up to b.added up
c.added to d.was added up to
解析：選a。由題意可知，此處意指“總計”，故用add up to，此短語一般不用被動語態。
★7.the engine of the ship was out of order and the bad weather_________the helplessness of the crew
at sea.
a.added to b.resulted from
c.turned out d.made up
解析：選a。add to 表示“增添”的意思。
【即境活用】
⑥ keep...out of 使……進不去；不讓……進入；把……擋在外面；避開
(回歸課本p45)this will keep air out of the water.
這將阻止空氣進入水中。
【歸納總結】
keep after追趕keep away遠離keep back阻止；隱瞞keep down吞下；鎮壓；控制keep sb. from doing sth.阻止某人做某事keep off防止，避開keep on繼續keep to堅持；履行keep up不低落；維持，堅持；繼續keep up with跟上
①you’d better keep yourself out of other people’s quarrels.
你最好不要卷入別人的糾紛中去。
②he begged the police to keep his name out of the papers.
他懇求警察不要在報紙上披露他的名字。
③please keep the dog out of the study.
別讓這只狗進書房。
【例句探源】
★8.i warned bill to________trouble while i’m away.
a.keep out of b.keep out
c.keep away d.keep back
解析：選a。句意“我警告比爾我不在的時候不要惹麻煩。”
9.________the fire，or your clothes may catch fire.
a.keep out b.keep away
c.keep to d.keep off