He speaks ________ fast ________ I can’t follow him．

Don’t forget ______ your homework ,Sue.— OK, I’ll do it at once.

If you want to get good grades, ____________, you should listen to the teacher _________ in class.

Did you find __________very interesting to play yo-yo?

Whose schoolbag is this?—It ___________ be Mary’s. It has her name on it.