单项选择题


A．to
B．being
C．as
D．to be
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单项选择题
The noise outside the classroom ______ me from listening attentively to the teacher.
A．contracted
B．distracted
C．subtracted
D．abstracted
单项选择题
Concrete, which is used in a wide range in modern society, ______ of cement, sand and gravel mixed with water.
A．consists
B．composes
C．concentrates
D．comprises
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