smile at A.听说 B.对...微笑
( ) ____ old are you ? A. What B. Where C. How
( ) He _____ from US. A. come B. go C. comes
( ) I _____ twelve . A. am B. is C. was
()Let’s ____ our class ! A. to begin B. begin C. begin to
()Go ____ to your seats . A. from B. in C. back