Heilongjiang is in the _____of China.
China has _____ area of about 9,600,000 square kilometers, including Diaoyu Island(钓鱼岛) .
--We’re going to a party for the exchange students this afternoon.-- . And say hello to them for me.
_______ mother usually cooks for ________ at the weekend.
"There is ________ in today's newspaper, so you needn't read it," the father says to his son.
"We will learn English words this year," the teacher said to the students.