【基础知识再回顾——查缺补漏】
回顾一：高频动词天天记
1. watch n. vi. vt.
keep a close watch on
on the watch for
watch for trail markers（注意路标）
watch a parade/ a play.
watch out
watch over
watch it ＝to be careful:
I had to watch it when I stepped onto the ice.（当我走上冰面就不得不留神了）
watch (one's) step（谨慎行事）
2. wish n.vt.
