1. –Two days __________ I went to see Miss Yang, but she wasn’t in.
--Oh. She has gone to Hangzhou three days ago.
A. ago, ago B. ago, before C. before, ago D. before, before
点拨：ago 和before都有“以前”的意思。 Ago通常与一般过去时连用。而before通常用于现在完成时态中。
2． --I’m going to have a picnic this Sunday. --That __________great.
A. sounds B. feels C. listens D. hears
Sound和feel都是系动词，后面都可接形容词作表语。Sound意为“听起来”，而feel意为“摸起来”，listen和hear 是行为动词，后面不可以接形容词作表语，listen意为“听”，而hear意为“听到”。
