题目内容
The stones are so heavy. How _____ they _____ to the top of the building without modern machines?
| A．do; lift | B．did; lift |
| C．were; lifted | D．were; lift |
C
解析试题分析：句意：这些石头如此重，没有现代工具它们是如何被举到建筑物的顶部的呢？they代指的是石头，石头是被举到建筑物的顶部，要用被动语态。故选C。
考点：考查动词时态及语态。
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