No matter how frequently ________ , the works of Beethoven always attract large audience.

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Can the plants ________ in greenhouses be protected from the wind, rain and insects?

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I think the development of agriculture should depend on high technology________ traditional methods.

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Most of the students can't ________ English a hard language.

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Great Britain ________ England, Scotland, Wales, and Northern Ireland.

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Lily ________ her mothers wishes when she married Tony.

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With the development of science and technology, the use of science and technology, the use of electronic computers in growing ________.

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No one can understand the way ________ I deal with the matter.

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Any two objects are attracted to each other, ________ , every body must have an attraction for every other body.

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We shall start off as planned ________.

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A．no matter he will come or not

B．whether coming or not

C．no matter whether he comes or not

D．whether he comes or not