单项选择题


A．However
B．Moreover
C．Though
D．Therefore
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单项选择题
A．shapesB．patternsC．conventionsD．forms
A．shapes
B．patterns
C．conventions
D．forms
单项选择题
A．someB．severalC．variousD．varied
A．some
B．several
C．various
D．varied
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