波多野吉衣百度云在线观看剧情介绍:[例4]— I usually go there by train.— Why not______by boat for a change？A.to try going B.trying to go C.to try and go D.try going【解析】答案D。why not 后面接不带to 的不定式，因此选D。[例5]Paul doesn’t have to be made______.He always works hard.A.learn B.to learn C.l...
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