—I have to be off right now.—What a pity! I you could stay a little longer with us.A. think B. am thinking C. thought
Though they are______little children , they have worked out _______many difficult math problems.
The doorbell is ringing. It _________ Alice , because she__________ Washington.
Yesterday Shirley advised me to buy my daughter _________ iPad as a birthday present._________ useful advice she offered me!
—The most beautiful teacher Zhanglili ________ a mother to her students. —Yes, she is really a good teacher.
—_________ do you want to join the music club? —Because I want to learn from others about music.