题文
Experts believe________people can waste less food by shopping only when it is necessary. (2013·北京，33)
| A．why | B．where |
| C．that | D．what |
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Experts believe________people can waste less food by shopping only when it is necessary. (2013·北京，33)
| A．why | B．where |
| C．that | D．what |
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