10.A.in B.by
C.near D.through
11.A.instead B.instead of
C.and D.or
12.A.stones B.earth
C.oil D.water
13.A.sorts B.families
C.classes D.groups
14.A.by B.out
C.through D.in
15.A.happily B.naturally
C.deeply D.hardly
16.A.moon B.sign
C.light D.signal
17.A.live B.active
C.living D.sleeping
18.A.feel B.touch
C.watch D.talk to
19.A.snakes B.monkeys
C.bears D.tigers
20.A.buy B.keep
C.sell D.catch