题目内容

Aare
Bhave been
Cis
D has been

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Acould
Bwould
Cmust
Dmight

Awant
Bwants
Cwanted
Dwanting

Awhat those
Bthat of those
Cthat all of
Dwhich of those

Aa thousand of
Bthousand
Cthousands of
Dthousands

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