After Steven sent some e-mails ,he______ surfing the Internet.

—Mary with her parents often ________to the zoo on Sundays. What about you?—I don’t often go there. But sometimes I go to see the animals on Saturdays.

I have bought a Chinese – English dictionary. When and where_____ you _____ it?

 Last Thursday when I got to the airport, I ____I had left my ticket at home.

— Mr. Lee ____ to a student when I entered the classroom this morning.-- He is very patient ____he is young.