单项选择题

His teacher demanded that his homework ______ on time.

A．is handed in
B．were handed in
C．was handed in
D．be; handed in
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单项选择题
What is the best title for the passage
A．The Sun
B．The Sun and the Earth
C．The Sun and the Life
D．The Sun and Time
单项选择题
______ English well, he translated the story without much difficulty.
A．Knowing
B．Knew
C．Known
D．To know
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