There are ________ of students in our school, but only ______ are girls.

The message is very important, so it is supposed_____as soon as possible.

When ，____your father ____back? When he _________ back, please give me a ring.

Hello, mum. Are you still on Lushan Mountain?－Oh, no. We are back home. We _________ a really good journey.

They are the students of ____.