A.attendant B.keeper C.member D.aide
A.seldom B.much C.never D.often
A.ideological B.biological C.social D.psychological
A.two years B.long-term goals C.current activities D.the goals that have been completed
A.They preserve flavor in packaged foods. B.They preserve the color of meats. C.They are the objects of research. D.They cause the animals to become fatter.
