不定式復(fù)習(xí)課件(更新版)
【正文】 n’t know what to do about it. 【 考點九 】 常用的 只帶 doing的詞 : keep doing enjoy doing practise doing finish doing mind doing how about doing be busy doing spend… (in) doing suggest doing prefer doing to doing 介詞 + doing of/for is helpful ____the students to learn puter. for is clever ___you to do so. of 3. It is necessary ____us to protect the earth. for
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