The math problem is so hard. I really don’t know .
—What do you do? —_______.
—Your sweater is very beautiful, Joan! —_______.
—Can I get you something to drink, Mr Smith?—_______. I am thirsty.
—Excuse me. May I use your computer? —_______. It’s broken.
—I haven’t seen Jack for three days, is he ill?—_______. His mother told me that he was in hospital.