10. Construction of the new highway system _______ completed on time if more workers had been hired.
(A) needs to be
(B) would have been
(C) will be
(D) should have
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統計: A(71), B(382), C(168), D(78), E(0) #1258247
統計: A(71), B(382), C(168), D(78), E(0) #1258247