4. By this time next year, the appearance of our station
_____ greatly improved.
(A) has been
(B) is
(C) is being
(D) will be
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統計: A(68), B(37), C(23), D(368), E(0) #2228373
統計: A(68), B(37), C(23), D(368), E(0) #2228373