单项选择题

When we speak, sound waves begin to travel and go in all directions.

A．当人们说话时，声音向四面八方传开。
B．当我们说话时，声音就开始传播，并且向四面八方传开。
C．当我们说话时，声波开始传递，而且向四面八方传播。
D．当说话时，声波就开始旅行，并且走向四面八方。
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单项选择题
By training its employees, a company can make them ______.
A．do their work more easily
B．be more interested in their work
C．willing to invest money into the company
D．possess the necessary qualifications for the job
单项选择题
Talking about the training she has received, a recently employed graduate has the view that ______.
A．it is still well-received by all the staff members today
B．it is valuable to the employers and the employees
C．it is helpful for attracting young employees
D．it is both useful and interesting
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