单项选择题

It's said that plants __________ with a virus give off a gas that stimulates disease resistance in neighboring plants.

A．interacted
B．inflicted
C．infected
D．induced
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单项选择题
The infectious disease posed a threat to the health of the local citizens and the whole area should be__________.
A．discarded
B．disappeared
C．remedied
D．isolated
单项选择题
With no qualifications and ill educational background, Henry __________himself __________a cleaner in that supermarket.
A．served; as
B．forced; into
C．resigned; to
D．excluded; from
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