The stones are so heavy. How _____ they _____ to the top of the building without modern machines?

A．do; liftB．did; lift
C．were; liftedD．were; lift

C

解析試題分析：句意：這些石頭如此重，沒有現(xiàn)代工具它們是如何被舉到建筑物的頂部的呢？they代指的是石頭，石頭是被舉到建筑物的頂部，要用被動(dòng)語態(tài)。故選C。
考點(diǎn)：考查動(dòng)詞時(shí)態(tài)及語態(tài)。

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