It ______(get) dark,what about______(go)home at once?

问题描述:

It ______(get) dark,what about______(go)home at once?

it‘s getting dark.what about going home at once?
前面用进行时会好点,后面的因为跟在介词之后
句子翻译为:快天黑了,马上回家怎么样呢?what about一般是提问什么的呀?还有和how about的区别是什么呢?请帮我在解释一下吧,谢谢了!