_____ to improving services, we will provide customers with all the information they need.
| A．Being committed | B．Having committed |
| C．Committed | D．Committing |
She is a well--known doctor now , but she _____ as a cleaner at the hospital for five years .
| A．has worked | B．worked | C．had worked | D．works |
Whatever background you come from , you can be ______ successful with your hard work like many others .
| A．equally | B．merely | C．mostly | D．hardly |
She was looking for her three nephews , but they were nowhere ______ ，which made her worried .
| A．to be found | B．found | C．seen | D．to see |
--I want some information on _______ package tour to Tailand .
-- ok , it costs 400 dollars ,including _____ accommodation.
| A．/ ; the | B．a ; an |
| C．the ;an | D．The ; / |
---This is John Smith from Pacific Bell in California. Could I speak to Mr. Green, please?
---_________.
| A．I’m speaking. | B．Hello. |
| C．Speaking. | D．Who are you? |