You may find the key to the math problem on page 107．—Ah, it’s so simpleI wonder why I _of that

Miss Chen teaches _______ English this term. —You’re lucky. _______ is a very good teacher.

It`s bad manners to laugh _____ others when they are _____ trouble　　[ ]

I’d like to arrive 20 minutes early___ I can have time for a cup of tea.

You have joined the Singing Club, haven’t you . I like singing, but I don’t have any time.