—Our flight is boarding now. We’ll have to part. —Don’t feel blue. ______.
Many parents have called head teachers to know ______ their children are getting along well with everything in the school.
The US Space Agency sent up a space probe to hit the moon to see ______.
You can never imagine what great trouble I have had ______the patient who receive a serious wound.
______ of the land in Jia Xing No. 1 Middle School _______ covered with trees and grass.
As is known to all language learners, the newly learnt words will soon be forgotten unless______ used in everyday communication.