I think _______ boy is not serious enough.

When I am down, my parents will do what every parent will do, _______ is to hug me tighter and tell me I am the best.

How strange _____ is that the students are so quiet in the classroom!

The teacher praised Wang Hai this morning because he made ___ mistakes in his composition.

Modern China is experiencing a completely new period_____respect for science and creativity has become the guiding principle of society．