_____, he would have been able to pass the exam.
AStudying more
BIf he studied more
CIf he were studying to a greater degree
Dhad he studied正確答案
答案與詳解
逐選項解析
AStudying more✕ 易錯陷阱
Studying more 是現在分詞片語，未明確表達本題所需的過去反事實條件；此處應使用過去完成式條件句。
BIf he studied more✕ 易錯陷阱
If he studied more 使用過去簡單式，典型用於現在或未來的假設；本題主句指向過去未實現的結果，應改為 If he had studied。
CIf he were studying to a greater degree✕ 易錯陷阱
Dhad he studied✓ 正確
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