22. _____ computer has been proved to be _____ important aid in classroom teaching.
--- Mr Wang, I have trouble _______ the text.---- Remember ________ it three times at least.
---- Will you answer the telephone? It ________ be your mother.---- Sorry, I _______. I’m very busy.
My parents will go there by taxi because it is raining _______.
---- Excuse me, is the supermarket far from here?---- No, it’s about ________.
There’s _______ 800-metre-long road behind ________ hospital.