单项选择题

We ______ on it for many hours, but we have not yet reached any conclusion.

A. are being worked
B. are working
C. have been working
D. have been worked
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填空题
Of all the hotels in the city, this one is the (good) ______.
单项选择题
We forgave her anger because we knew that her father’s illness had put her under great ______.
A. shelter
B. crisis
C. stress
D. nervousness
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