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【单选题】
What do you usually do ?A.
in your spare time
B.
on your spare time
C.
at your free time
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反馈参考答案：
举一反三
【单选题】An administrator needs to configure a server to restrict mail traffic to an application server for security reasons. Which of the following techniques can be used to manage this？（）
A.
PAT
B.
ACLs
C.
Subnet masking
D.
Port blocking
【单选题】As an increasing number of traffic regulation schemes are devised, a ______ driver finds himself diverted and forced into one-way systems which cause even greater delays than the traffic jams they are...
A.
bewildered
B.
embarrassed
C.
hampered
D.
diverted
【简答题】Traffic (restrict) have come into effect in Beijing in an attempt to improve the capital's air quality and traffic situation for the Olympics.
【单选题】Attempts to restrict parking in the city center have further _________ the problem of traffic congestion, and sometimes the traffic comes to a complete stop in some places.
A.
degraded
B.
aggravated
C.
amplified
D.
diffused
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