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You'd better ________ her number in the phone book.

A. look into

B. look for

C. look up

You'd better ________ her number in the phone book.

A. look into

B. look for

C. look up

You'd better ________ her number in the phone book.

A. look into

B. look for

C. look up

You'd better ______her number in the phone book.

A．look for           B．look into            C．look after           D．look up