Question

Because of ________ high demand for Type AB blood, ________ supplies of it are usually limited.

A. the; the B．不填；不填

C．不填；the D. a; the

 

Answer 1

D

【解析】D 考察冠词。句义：由于对AB血型血液的高需求，它的供应受到限制。第一空表示泛指，第二空特指AB型血型的供应。