题目内容

选择可以替换句中划线词的正确答案:

When you look at ['pirmid]n. 金字塔) you can't help wondering (['wnd]v. 惊奇) how the Egyptians ([i'dip n]n. 埃及人) were able to build them thousands of years ago.

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  A. can be able   B. could be able   C. can   D. could

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