Few men pay full attention to their health conditions ________ they are seriously ill.

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Form her ________ voice, the play was perhaps very ________.

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There are many things which have to ________ before we finally make up our minds.

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The number of people invited ________ fifty, but a number of them ________ absent for different reasons.

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An average of 3,000 letters a month ________ by the newspaper's office.

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The total of trees planted this spring ________ by the newspaper's office.

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He speaks Chinese with a foreign accent. Sometimes the class ________ understand what he is saying.

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--________ either he or I fit for the job?

--Neither he nor you ________.

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The population of the country ________ large, and two-fifths of it ________ workers.

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No chair and no desk ________ permitted to be taken out of the room.

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