TheBentPyramidoutsideCairo__________ancientEgypt’sfirstattempttobuildasmooth-sidedpyramid.-查字典考试网

TheBentPyramidoutsideCairo__________ancientEgypt’sfirstattempttobuildasmooth-sidedpyramid.

A、hasbeenbelievedtohavebeen
B、wasbelievedtobe
C、isbelievedtohavebeen
D、isbelievedtobe

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