18.
(A) need to take
(B) needs to take
(C) have to be taken
(D) must be taken

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統計: A(3), B(6), C(7), D(50), E(0) #1575789

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Care must be taken t...
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私人筆記#7974009
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邏輯與語法解析: 主詞判斷:這句話的...
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