—Dad, when shall we go to visit my grandpa?
—Grandpa is very busy at present.We'll go to see him whenever __________.
A.he is convenientB.he will be convenient
C.it is convenient to himD.it will be convenient to him
C
首先,若用convenient表示“某人方便”之意,絕對不能使用人作主語,而應(yīng)使用it,由此排除A、B選項,類似地,possible等形容詞也不能以人作主語,應(yīng)使用it作主語。此外,由whenever引導(dǎo)的時間狀語從句遵循的是“主將從現(xiàn)”原則,由此判斷答案為C
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