— 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

—We will go for a picnic tomorrow unless it rains.

—For a month.

It depends on {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} today.

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