— _______ can a tiger weigh, do you know? — Yes, I know that a big one can weigh over 300 kilos.
Hundreds of students came to Shaoxing to work________the World Choir Games in 2010.
—When does your mother go shopping? —Usually________Sunday morning.
Studying in groups is necessary________you want to do well in school.
—Would you like some________? —Yes,please.I’m thirsty.
The new Apple’s product(产品)“iPhone 4S”is________among the young people.