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

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

A.to learn
B.to finish
C.to teach
D.to send

A.young children
B.street children
C.rich children
D.weak children