The Tianwen-1 Probe landed on Mars May 15th, 2021.

1. The Tianwen-1 Probe landed on Mars May 15th, 2021.

A. at B. in C. to D. on

【考点】

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【答案】

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1. If you want to have a good knowledge of a person, you need to learn more _______him.

A. about B. of C. on D. at.

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A. on B. at C. in D. by

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