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 |
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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 |