we waved our hands----- our friends could see A so that B such what C that so D that such

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we waved our hands----- our friends could see A so that B such what C that so D that such
we waved our hands----- our friends could see
A so that B such what C that so D that such

we waved our hands----- our friends could see A so that B such what C that so D that such
we waved our hands----- our friends could see us
A
so 表示以便,所以.that引导一个从句

A :以便,所以 √

A

选A.
我们挥舞双手,以便我们的朋友可以看见我们。
so that,以便。