What do you think ______solve the problem?
( ) Bob ____ from Britain . A. is B. were C. am
( ) ____ 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