单项选择题

To overcome the difficulty they were faced with, several companies ______ to form a big one.

A．linked
B．united
C．joined
D．connected
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Don't worry about it. Sometimes the symptoms can be quite ______.
A．severe
B．light
C．mild
D．weak
单项选择题
Attention, coffee lovers! We have for you, the best coffee machine ______ invented.
A．ever
B．already
C．even
D．nowadays
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