The students entered the classroom, smiling and _____, and _____ down to have their lessons.[ ]

Don’t ____sad(伤心难过的). Let’s go and fly akite.

It is not who is right but what is right ______ is of importance.

f the educators are ________ providing more freedom to the teenagers, believing that it may make them more creative and independent.

“Wechat”(微信) really makes a great _________ to people’s life. It’s easy for us to keep in touch with others.