All the students are talking and laughing in the classroom and it’s _______.

You _______ be happy with the strong public support you’ve received.－Yes,you’re right.I’m really excited.

Whose shirt is this?–It _______ be Li Lei’s. It is too big for him.

______ you help me mend the radio? —Yes, I can.

Your words remind me ______ my friends. [ ]