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

本题考查冠词。a demand for 固定搭配一个…需求；the supplies专指前面AB血型的供给。句意：因为对AB型血有很高的要求，它的供应通常是有限的。