39. _____ carefully in advance, the activity should be very successful.
(A) Planning
(B) If planned
(C) To plan
(D) When planning
詳解 (共 3 筆)
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should be為「應該」有假設意味,...
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此題考假設語氣用法: If .........
私人筆記 (共 3 筆)
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_____ carefully in a...
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if planned carefully...
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(A)Planning (B)If pl...