A. dance/ sing
B. to dance/ sings
C. dancing/ singing
D. dancing/ to sing
A. to build
B. built
C. building
D. with building
A. watching
B. to watch
C. watch
D. watched
A. was watching/ listening
B. watched/ listened
C. was watching/ was listening
D. watching/ listening
A. careless
B. carefully
C. carelessly
D. careful
A. office
B. official
C. officer
D. officially
A. region
B. regional
C. regionally
D. regioner
A. windsurf
B. windsurfing
C. to windsurf
D. to windsurfing
A. stealed
B. was stealing
C. was stolen
D. stole
A. who
B. whom
C. whose
D. which
A. to fly
B. flying
C. be flying
D. fly
A. is grown
B. is being grown
C. are grown
D. are being grown
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