单项选择题

All this () that knowledge comes from practice.

A. speaks
B. proves
C. explains
D. teaches

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单项选择题
—How do you find the talk given by Mr. Smith —().

A. Very well
B. Excited
C. Boring
D. Not at all
单项选择题
Syntax is the study of______.
A. language functions

B. sentence structures
C. textual organization

D. word formation
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