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The drilling in Antarctica dragged on slowly because of lack of money, equipment breakdowns, environmental ______ and severe cold.

We will be given a(n)        to ask questions at the end of the lecture.

I enjoyed all his novels with the_____of his last.

Living in a big city has many _____, such as good schools, libraries and convenient traffic.

She had stomach trouble and had to follow _____.

It will take a lot of time and_____ to finish the task on time.

____ speaking, a person must care much about his ____, because it is not only a personal thing, but also a social one.

Currently，many American women are still faced with the _____ of choosing between work and family commitments.

People who are infected with HIV are often looked down upon because social _____ against the disease runs so deep.

In human, there is a possibility of ____ such as fever and headaches if there is exposure to the virus.