1. The manager        a new desk,for he is preparing to apply for a patent these days (design)

那個(gè)經(jīng)理一定設(shè)計(jì)了一個(gè)新的桌子,因?yàn)樗@幾天正準(zhǔn)備著申請專利。

1. must have designed must have done用于對過去的事情進(jìn)行肯定推測。根據(jù)下文"在申請專利"可知,新桌子已設(shè)計(jì)出來了,因此design是過去的動作。

題目來源:高考英語組合訓(xùn)練多項(xiàng)選擇+完成句子 > 組合訓(xùn)練57-58

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