答案:D
解析:
The error in this sentence occurs at (D), where there is an inappropriate verb form. The verb phrase “to have used" is needed to clearly express what Galileo was the first person to do.
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答案:D
解析:
The error in this sentence occurs at (D), where there is an inappropriate verb form. The verb phrase “to have used" is needed to clearly express what Galileo was the first person to do.