________ seems to be a strong competition in China for senior high students to enter college or university.
— I hear Kris had an accident as he was riding his bike to school yesterday.— ________? He is always so careful when he is riding.
______ the numbers in employment, the hotel industry was the second largest industry in this country last year.
_________along the quiet road at forty miles an hour, and then an old man suddenly started to cross the road in front of me.
Besides proper diet, exercise is one of the key ___________of a healthy lifestyle.
After ten hours’ drive, we came to ______ is called a green house, through the glass wall of _____, we saw lots of green plants.