单项选择题

A．change
B．vary
C．remain
D．last
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单项选择题
A．WhichB．WhatC．WheneverD．Whatever
A．Which
B．What
C．Whenever
D．Whatever
单项选择题
A．Food Additives.B．Cancer-related labels.C．Food-related diseases.D．Bad Effects of Food on Health.
A．Food Additives.
B．Cancer-related labels.
C．Food-related diseases.
D．Bad Effects of Food on Health.
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