49. Consumers may not think of household cleaning products to be hazardous substances, but many of them can be harmful to health, especially if they are used improperly.
(A) Consumers may not think of household cleaning products to be
(B) Consumers may not think of household cleaning products being
(C) A consumer may not think of their household cleaning products being
(D) A consumer may not think of household cleaning products as(D)
(E) Household cleaning products may not be thought of by consumers, as
A和D差别仅仅是单复数的问题,为什么选D呢? |