Li Ming is a student who is easy ___ though he has some trouble ____ his lessons.
According to some students, ______ listening practice is still ______ must in Senior 3, because it helps promote the sense of language.
. Can you tell me the way you think of________ the problem?
It's not necessary to explain the truth _____ there is spring wind, there is green grass.
Mother asked the youngest kid _____________ with his toy car.
Practisig Chinese kung fu can not only ________ one’s strength, but also develop one’s character.