The old man is an , and he a lot of things all these years.

题型：单选题题类：常考题难易度：普通

仁爱科普版九年级上Unit 4 Amazing Science Topic 1 When was it invented?同步练习1

A、invention; invent B、inventor; invent C、inventor; has invented D、invention; inventor

举一反三

—Yes, it's a major way of for them.

—Really？I didn't know that before .

—Sorry, we won't do that again.

—Not ________. I just need some time to get used to it.

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