问题
选择题
23．We still remember once__________round the famous tower when we were young.
A．having taken
B．to be taken
C．having been taken
D．to have taken
答案
答案：C
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23．We still remember once__________round the famous tower when we were young.
A．having taken
B．to be taken
C．having been taken
D．to have taken
答案：C