25. The government plans to _____ the metro system to reach more areas in the city’s outskirts.
(A) resist
(B) reduce
(C) protect
(D) expand
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統計: A(3), B(7), C(4), D(32), E(0) #3492433
統計: A(3), B(7), C(4), D(32), E(0) #3492433