A.when
B.until
C.which
D.where
A.do
B.did
C.done
D.doing
A.Surf
B.Surfed
C.Surfing
D.Having
A.to
B.as
C.of
D.that
A.into
B.in
C.through
D.back
A.playing
B.play
C.to play
D.played
A.what
B.which
C.where
A.in
B.out
D.to
A.good
C.that
D.better
A.where
B.when
D.at
A.user
B.useful
C.use
D.using
B.into
D.in
A.with
B.also
C.as
D.too
B.to
D.about
A.enables
B.enable
C.enabled
D.enabling
A.got away
B.get away
C.get into
D.got into
D.which
A.give
B.gave
C.going
D.go