{01}All the ______ must be cautious of the dangerous wall. A.passer-by B.passer-bys C.passers-by D.passers-bys 解析: 本题选C。
{02}It is a pity that none of the ______ stopped ______ the poor man lying there, begging. [ ] A.passer-bys; to help B.passers-by; helping C.passer-bys; helping D.passers-by; to help 解析: 本题选D。
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