What is ______ month of the year ? —It’s December .
Is air the lightest thing in the world?– Not . Scientists from Zhejiang University have just developed the world’s lightest material.
Could you please tell me _____ tomorrow?- At 8 o’clock.
.Young________, he already knows what career he wants to follow.
The flat in shanghai is _________ than _________ in Wuxi.