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 ―I have a favour to ask you.

―________.

    A. Go ahead           B. It’s a pleasure           C. Help yourself     D. Ask, please

一I have a favour to ask you．

一        ．

A．Go ahead

B．It’s a pleasure

C．Help yourself

D．Ask，please

—I have a favour to ask of you.

—______.

A. Go ahead            B. It’s a pleasure

C. Help yourself      D. Ask, please

 —I have a favour to ask of you.

      —______.

      A. Go ahead            B. It’s a pleasure         C. Help yourself       D. Ask, please

--Bob, are you free at the moment? I have to ask you for a favour.

--_________.

　 A. It’s a pleasure.　　　　 B. Go ahead　　　　　 C. Help yourself　　 D. Ask, please