Published in 1974，the book was a(n) ________ success and was soon translated into thirteen foreign languages.

The Ipad looks like ________ one I showed you last time, but if you take _______ second look, you will find it’s a different one.

34．— I think I’ll give Bob aring. — You______you haven’t been in touch with him for ages.

Your sister nearly _______ all her spare time to her study during the three years. —That’s right, or she ________ the first place in her school in the examination.

The teacher is busy ____ teaching