A: _ did you come so late to your office this morning? B: Oh, I felt so sick that I couldn't get up on time. A. How B. Which C. Why
—Are they from England? —_______.
These are my shoes. Yours ______ yellow.
—______ is this? —It's yellow.
There is a police car _____ the bus. The police are watching the traffic.
—Lily, here are your pens. Please _____. —OK, Mom.