The doctors are busy operating __________ the wounded young
題目：
The doctors are busy operating __________ the wounded young man.
on
in
at
for 選哪個
解答：
on
operate on 給...做手術
題目：
The doctors are busy operating __________ the wounded young man.
on
in
at
for 選哪個
解答：
on
operate on 給...做手術
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