题目内容
His plan _____ to be a perfect one.
| A.proved | B.was proved | C.is proving | D.proving |
A
prove为系动词,意思是“被证明是”,其后跟“(to be)+形容词﹑名词等”作表语。
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题目内容
| A.proved | B.was proved | C.is proving | D.proving |