填入所缺的词，然后查看第1课的课文。

Write in the missing words, and then look at the text in Lesson 1.

youdao

填入所缺的词，然后查看第3课的课文。

Write in the missing words, and then look at the text in Lesson 3.

youdao

听录音，填入所缺的词。

Listen and fill in the missing words.

youdao

听录音，填入所缺的词。

Listen and fill in the missing words.

youdao