The twin brothers look so alike that it is very difficult to tell one from .
_____ concern about food safety seems to be ______ subject that is being discussed all over the world.
______ two pandas from Chinese mainland has become ______ hot topic in Taiwan.
Winters in ______ north of China are for_____ most part dry and cold.
Would you like knife and fork,or would you rather use chopsticks,sir?
—Has the little boy passed P. E. test?—He has tried twice and the teacher will allow him to have third try. the;不填 B. a; the C. the; a D. the; the