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阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

Roofs and windows of buildings aren’t the only surfaces that can be used to produce solar power. In China, 1. (construct)has begun of  the  country’s  first solar  highway,  in  which  solar panels  are  placed  underneath transparent concrete.

The solar highway is a 2 km stretch(一段)of road  2.(lie)on the Jinan City Expressway, and it’s divided into three layers. The see-through concrete protects a set of solar panels of two  3.size). Beneath the solar panels 4. (be)a layer that separates them from the damp ground.

The road  5.(it)has already been completed, and now it’s only a matter of connecting the grid(输电网),  6.  is expected to be finished by the end of the year alongside the completion of the Jinan Expressway’s south section.

This isn’t the first solar road China has worked on. Earlier this year, the Qilu Transportation Development Group, also handling the Jinan Expressway solar road,  7.(build)a 160-meter- long solar road in  8. city of Jinan. It has the ability of heating up to keep the highway clear  9. snow and ice* and is able to  10. (wireless) charge electric vehicles. The new solar highway is expected to one day be equipped with the same features.

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