单选题 Mr. Willis wants to scan all of his old documents and transfer the images ______ his computer for safekeeping.
A. beside B. within
C. around D. onto

【正确答案】 D
【答案解析】[解析] 本题为选择恰当的介词的问题。只有句子表示“电脑上”时，句意才通顺，因此onto意为“……上”为正确答案。