单项选择题

Einstein’s special theory of ______ , far from being obscure and difficult, can be understood in its basics with no more than first-year algebra.

A．relative
B．relativeness
C．relativity
D．relatively
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单项选择题
______ the plan carefully, he decided to take it.
A．To have judged
B．To judge
C．Having judged
D．Judging
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