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
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
D
a demand for 固定搭配一个…需求；专指前面AB血型的供给。