13. In my school days, I ______to English radio programs every day. That was how I
learned English at that time.
(A) listen
(B) have listened
(C) used to listen
(D) was listening
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統計: A(282), B(126), C(752), D(113), E(0) #1996773
統計: A(282), B(126), C(752), D(113), E(0) #1996773