A.to
B.for
C.on
D.in

A.at
B.until
C.for
D.from

A.dragon
B.dinosaur
C.bear
D.eel

A.pollution
B.condition
C.question
D.occupation

A.machine
B.children
C.champion
D.cheapness

A.restaurant
B.necessity
C.composer
D.director

A.restaurant
B.necessity
C.composer
D.director

A.countryside
B.Vietnamese
C.dishwasher
D.festival

A.gallery
B.microphone
C.musician
D.instrument

A.the homeless
B.the rich
C.the happy
D.the old