问题
选择题
Because of _____ high demand for Type AB blood, _____ supplies of it are usually limited. [ ]
A. the; the
B. /; /
C. /; the
D. a; the
答案
答案：D
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Because of _____ high demand for Type AB blood, _____ supplies of it are usually limited. [ ]
A. the; the
B. /; /
C. /; the
D. a; the
答案：D