— Do you know ?— In the 6th century.

题型：单选题题类：常考题难易度：普通

牛津深圳版九年级上册Module 3 Leisure time Unit 6 healthy diet同步练习

— Do you know ?

— In the 6th century.

A、when is the abacus invented B、when the abacus is invented C、when was the abacus invented D、when the abacus was invented

举一反三

— You can go there by subway.

—They can be reused many times. In this way, we can help make the earth greener.

—Sure. You can take the K2 bus.

—Certainly. Go along the street and you will find it on the left.

— Yes. We will go to Mei Lanfang Theatre.

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