题目内容
In face of increasing energy limits, China needs ______ major breakthrough in mining and exploration.
A. a; a B.the; a C.不填; the D.不填; 不填
B
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题目内容
In face of increasing energy limits, China needs ______ major breakthrough in mining and exploration.
A. a; a B.the; a C.不填; the D.不填; 不填
B