单项选择题

The new dentist is much better than his predecessor.

A．his previous boss
B．his ancestor
C．the previous dentist
D．his forefather
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单项选择题
It is a level that must extend beyond purely biological needs to comprise a set of indispensable machines and social interactions.
A．consist
B．surround
C．encompass
D．confine
单项选择题
We become susceptible to the moods and feelings, the behavior and treatment of our spouse,
A．responsible
B．suspicious
C．committed
D．vulnerable
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