Theywereabroadduringthemonthswhenwewerecarryingoutthein...

問題詳情：

They were abroad during the months when we were carrying out the investigation, or they        to our help.

A. would have come     B. could come    C. have come     D. had come

【回答】

A

知識點：虛擬語氣與情態動詞

題型：選擇題