( ) 1. The twin brothers_________ in different classes.
A. am B. is C. are D. be
( )2.Sam’s father often ________ for a walk after supper.
A. go B. goes C.is going D. gos
( )3. Bob _________ well in P.E.
A. don’t B. doesn’t do C. doesn’t D. don’t do
( )4. Which country_________ the largest population, China, India or Japan?
A. has B. have C. is D. are