题文
The conference aims to develop business and let people think about ______ they can have a positive influence on the Earth.
| A．why | B．that |
| C．what | D．how |
推荐试卷
The conference aims to develop business and let people think about ______ they can have a positive influence on the Earth.
| A．why | B．that |
| C．what | D．how |
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