Only when class began ______that he had left his book at home.
It is a Japanese _______to take off one’s shoes before entering a house .
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 .