vegetables are cheap___when they are in the season.
a. to buy b.to buy them c.to be bought d. buying them
选A. 表示主语本身的特征时,用主动表被动. 例如:The shoes sell well.鞋卖得挺好.
to buy
答:1.选D. bought have sth done 固定句型,使某事被作 2.选C,与上题题型一样详情>>
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