单项选择题

We investigated other companies in the market to discover ______ they handled complaints from their customers.

A．that
B．how
C．what
D．where
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单项选择题
Which of the following special services is provided by the company？（）

A．Wedding Service.
B．Booking hotels in London.
C．Travelling around the world.
D．Discounts for frequent travelers.
单项选择题
The professional sales team of the company can help clients to （）.

A．save money while eating in London
B．do sightseeing at a lower price
C．get free special private services
D．enjoy free shopping trips
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