She will call you if she ____.

—Mom, my classmates invited me ____ a field trip. May I go with them?
—OK.

—John isn’t happy today. Let’s go and ____.
—Good idea.

The doctor said he ______ any help.

At the beginning of the class, Miss Liu ______ the exercise books to the students.

--- A new book on how to prevent floods and droughts is ____ soon.   
--- Really ? I can’t wait to read it.    

--- Nancy, you are going to buy a flat here, aren’t you ?
--- Yes, but I can’t ____ an expensive one .                                

How about _______ a scarf ?
A. buy           B. buying        C. to buy

The teacher encourages her students _____ English as much as possible.  A. to speak     B. speaking      C. speak

The radio is too loud. Will you please _______ ?
A. turn it down    B. turn it on    C. turn off it