---How much difficulty did you have________________ this physics problem?---_____________. It's quite easy.
—What’s that ____ English? —It’s a desk. A. from B. to C. in
—_______is the boy? —Fifteen. A. Where B. How old C. How
—Is Mr. Wang your teacher? —Yes, and ____ is an good English teacher. A. he B. she C. it
—____ ? —Yes, I’m Mike. A. What’s your name? B. What are you? C. Are you Mike?
--Mary and I ____ from the U.S.A. A. am B.is C. are