Be a waste of time 后加doing还是 to do .教参上都是doing,但Oxford初阶上用to do.
问题描述:
Be a waste of time 后加doing还是 to do .教参上都是doing,但Oxford初阶上用to do.
答
Be a waste of time 后加doing还是 to do .教参上都是doing,但Oxford初阶上用to do.