He did his homework carefully for fear that he would make a

題目：

He did his homework carefully for fear that he would make a mistake.這是我的書上的答案
但是在另一個百度知道的問題中,答案確是He did his homework carefully for fear that he ( ).
A.made a mistake B.makes a mistake C.would make a mistake D.make a mistake
選B,因爲前面是有for fear 所以後面要接一般現在時態
哪個對?我這個書上的.

解答：

選D.
因爲句子意思是害怕犯錯誤,而實際並沒有犯錯誤,所以是虛擬語氣,fear that+(should)+動詞原形
應該是這樣的