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9. It is already 12:30 now,but dad hasn,t come back. He          the traffic jam on his way home. (catch)

已經(jīng)12點半了,爸爸還沒有回。他一定是在回家的路上遇到了交通堵塞。

9. must have been / got caught in考查情態(tài)動詞表推測的用法。本題為對已經(jīng)發(fā)生的事情進(jìn)行推測,因此用must have done。表示對當(dāng)前行為、情況或;1夫態(tài)的4隹測,用must / may / might / could + do / be句型;表示對此時此刻正在進(jìn)行的動作的推測,用must / may / might / could + be doing句型;表示對過去發(fā)生的事情的推測,用must / may / might / could + have done / been 句型。否定句中用can / could not(想必不會,不可能) 或may / might not(可能不) 表示否定推測。疑問句中用can / could...?表示"……可能嗎?會是……嗎?"。

題目來源:高考丟分題英語 > Unit 2 Robots

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