In early human history, our ancestors used ____ tools to survive in a challenging wild.

1. In early human history, our ancestors used ____ tools to survive in a challenging wild.

A. reflective B. commercial C. primitive D. negotiable

【考点】

形容词的词义辨析;

【答案】

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单选题普通

1. He felt ________ of cheating in the exam, deciding never to do such things again.

A. shame B. ashamed C. sorry D. shameful

单选题容易