--- Betty , welcome to my birthday party . Please make yourself at home .--- ________.
My grandfather is as _______as a yong man and hates sitting around doing nothing all day . A.enthusiastic B.energetic D.attractive D.sensitive
Contrary to popular _______,eating carrots does not improve your eyesight .
It is thought that meteories (陨星)may hold clues about the ________of life on Earth .
He is having a family party in ________of his 84th birthday .
It is important to know about the cultural differences that________cause problems.