Do you know Tom quarreled with his brother? —I don’t know,______.[ ]

I don’t know who __________ the boy stand here. How poor he looks！

Mr Green is second ______ speed _______ none as a famous athlete

________flights had to be put off because of the hurricane all those days .

下列各句中“而”的意义和用法，与例句相同的一项是（ ） 例：吾尝终日而思矣