英语语法题,求此四项改错,并解析
Scientistsbelievethatbyaltering(A)thegeneticcompositionofplantsitispossibletodevelopspecimensthatareresisting(B)todisease(C)andhaveincreased(D)foodvalue.
选项:
a、altering
b、resisting
c、disease
d、haveincreased
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