介绍:
beware /bi’weə/ v. 当心，小心
beware of sth/sb
Beware of saying anything that might reveal where you live.
说话时谨防透露你的住址。
expense /ik’spens/ n. 费用；开销
leak /li:k/ n. 漏洞，裂缝
sink /siŋk/ v. 下沉，沉没 sink,sank, sunk
练习1：船沉入海底。
练习2：我们今年最大的开销就是夏季度假。
1.The ship sank to the bottom of the sea.
2.Our biggest expense this year was our summer holiday.
