--- Why haven’t you asked Lisa to come here?--- She was writing a paper when I found her and she ______ it.
My grandmother used ___ an English teacher.
Miss Liu will teach ___ English nest month.
—Where can I see Tom? —I don’ know where he is. He hasn’t arrived ___ .
— What do you think of the two cars? — The one is ___ than that one.
— I think it’s a good idea to have classes on the Internet. — ______ . I don’t want to stay at home alone.