听录音，选出你听到的句子（）

1. 听录音，选出你听到的句子（）

At the beginning of the 20th century, cars became popular.<br />At the beginning of the 20th century, cars became popular.

A . At the end of the 20 century, cars became popular. B . At the beginning of the 20 century, cars became popular. C . At the start of the oh century, cars became popular.

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1. 听录音，选出你听到的句子（ ） At the beginning of the 20th century, cars became popular.<br />At the beginning of the 20th century, cars became popular.