—Mary can't help ______ the house. Why?—Because she is busy______ a hotel reservation.A. cleaning; making B. to clean; making C. cleaning; to make
A lot of food __around the world every year. We must do something for it.
________the afternoon of June 1st, many foreigners arrived ______Beijing.
Mom, I don’t know how to work out the math problem. Could you give me a hand?
Why are you mad at me, John?
Mary told me to wait for her at the school gate, but she didn’t appear at all.