问题:
【题文】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
【题文】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 |
参考答案: