摘要： There is a new problem in the popularity of private cars that road conditions need to be improved.A. involving B. involved C. being involved D. having involved
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There is a new problem________in the popularity of private cars that road conditions need improving.
| A．involved | B．to involve |
| C．involving | D．being involved |
There is a new problem________in the popularity of private cars that road conditions need improving.
A．involved B．to involve
C．involving D．being involved
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There is a new problem________in the popularity of private cars that road conditions need improving.
- A.involved
- B.to involve
- C.involving
- D.being involved