To meet the challenge, the young people preferred _______ heavier work to do in their spare time.
A．to have  given |
B．to be giving | C．having give | D．to be given |
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To meet the challenge, the young people preferred _______ heavier work to do in their spare time.
| A．to have given |
B．to be giving | C．having give | D．to be given |
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