(31)
A.recovered
B.cured
C.improved
D.remedied

If someone has a problem, there is always people who can help.
A.if
B.has
C.is
D.who

(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