(23)
A.information
B.experience
C.knowledge
D.observation

(20)
A.direction
B.destination
C.departure
D.situation

The air is also very clean because of there is not much traffic.
A.the air
B.because of
C.much
D.traffic

(21)
A.capable
B.ready
C.favorable
D.convenient

(19)
A.covered
B.surrounded
C.sheltered
D.stopped

(17)
A.wish
B.wished
C.wishing
D.to wish

(15)
A.choose
B.select
C.decide
D.opt

(13)
A.beverage
B.consumption
C.expenditure
D.sales

People never throw his rubbish on the roads, but the village is always clean.
A.his
B.but
C.clean
D.Both A & B are mistakes

(11)
A.make
B.feel
C.take
D.get