单项选择题

（）, the professor is still trying to learn a new language.

A. However he is old
B. Old as he is
C. He is as old
D. As old he is

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At the meeting there was a hot argument and so many problems were left （）.

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B. solving
C. solved
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Today, household chores have been made much easier by electrical ______.
A. facilities
B. equipment
C. appliances
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