【題目】No one knows how the huge rocks _______ and _______ without our modern machines eight hundred years ago.

A. were cut; moved B. were cut; move C. are cut; moving D. are cut; moved

【答案】D

【解析】根據(jù)時(shí)間狀語(yǔ)可知從句中敘述的為過(guò)去發(fā)生的事情, cut和moved為并列謂語(yǔ)所以

用過(guò)去時(shí)態(tài),故選D

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