He earned enough money to start his own business _____ offering guide services _____ tourists.

  A. by; to           B. with; at  

  C. on; for          D. through; with

He earned enough money to start his own business _____ offering guide services _____ tourists.

1. A.
   by; to
2. B.
   with; at
3. C.
   on; for
4. D.
   through; with

He earned enough money to start his own business ________ offering guide services ________ tourists.

A. by; to　　　　　　    B. with; at　　　　　　 C. on; for　　　　　　　　　　 D. through; with

A. by; to　　　　　　    B. with; at　　　　　　 C. on; for　　　　　　　　　　 D. through; with

He earned enough money to start his own business ________ offering guide services ________ tourists.

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