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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】What type did you write down on your application, introvert or extrovert?
A.
letters that are printed
B.
use a keyboard to write
C.
class or group of people based on shared characteristics
【单选题】Their complicated web of friendships can be followed online.
A.
system on the Internet
B.
spider's net of thin threads
C.
pattern of closely connected things
【单选题】People who isolate themselves from society might be criticized for living in a vacuum.
A.
machine to clean floors
B.
disconnected from other people
C.
space empty of all substances
【单选题】The dean plans to propose a change in dormitory arrangements.
A.
make a formal suggestion for others to decide on
B.
ask someone to get married
C.
offer an explanation for something