how do people go to work by bike,others _.a.aren't b.doesn't c.don't d'didn'twhat's sally doing?a.having great fun watch b.has great fun watching c.having great fun watching d.have great fun watches选哪个,为什么?要原因.
问题描述：
how do people go to work by bike,others _.a.aren't b.doesn't c.don't d'didn't
what's sally doing?
a.having great fun watch b.has great fun watching c.having great fun watching d.have great fun watches
选哪个,为什么?要原因.
答