对某人做调查是do some research on sb.还是to sb.还是别的介词?

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• 对某人做调查是do some research on sb.还是to sb.还是别的介词?
• 对某人做调查是do some research onsb.还是to sb.还是别的介词?
• ________she first heard of the man referred to as a specialist.如何做这道题,请详解________she first heard of the man referred to as a specialist.A.That was from Stephen C.It was from Stephen that B.It was Stephen whom D.It was Stephen that
• he has been to the moon for_____at timessometime several timessometimes主要是不懂句子的意思,无法做题、.