—Hurry up! We are late for class. —Take it easy (别急). We have time.
It took them three hours ___ homework.
This is _____ pen and ________ is in the pencil-case.
— ______ do you go to the movies? —Once a month.
The baby kept ________and the mother felt_________________ .
The sentence structure of ‘A baby panda is drinking her mother’s milk.’ is .