SAT二道语法题,1.After [many years] of training,some art

SAT二道语法题,1.After [many years] of training,some art

第一题 in reacting at 并不是一个固定搭配,前面的词组是 be skilled in sth or doing sth,而react在此是不及物动词,其用法如下：不及物动词 vi.1.作出反应,反应[(+to)]How did she react to the news?她对这个消息反应如何?2.影响,起作用[(+on/upon)]The two react upon each other.这两者互相影响.3.抗拒,反抗[(+against)]Children tend to react against their parents by going against their wishes.孩子们通常以违背父母的意愿来反抗他们.4.起反作用,回过来起作用[(+on/upon)]Unkindness often reacts on the unkind person.恶人往往有恶报.5.【化】起化学作用;【物】反应[(+with/on)]How do acids react on metals?酸对金属会起怎样的化学反应?An acid can react with a base to form a salt.酸和碱反应会产生盐.此句是第一种用法,所以应用reacting to第二题涉及到need的用法,它既可用做实义动词,也可用做情态动词,在此句中,因为其后加了not,故是情态动词,没有第三人称单数,也就不可加“s”.======以下答案可供参考======供参考答案1:1 应该是：in reacting to 2 need not purchase tools== doesn't need to purchase tools.供参考答案2:1.react to 2. need 在这里是情态动词，应为后面跟动词原形，所以是need not ；如果后面跟to do 结构，则need就是实义动词了，可以用doesn't need

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