[題目] 國學題目求解
書名：國際學村 Reading大全
題目：
______ remain significant challenges for the fledging business as it tries to gain a foothold in a highly competitive market.
(A) It
(B) There
(C) These
(D) That
疑問：為什麼是(B)而不是(A)或是(C)
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※ 編輯: smile2271 (27.242.234.48), 05/30/2018 16:27:22
※ 編輯: smile2271 (27.242.234.48), 05/30/2018 16:27:46
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