Scientists have designed “transparent wood” that could replace conventional glass in windows.

D篇：本文是一篇说明文，介绍了一种木材经过人工处理后变透明可以代替玻璃。
32.B. 猜测词义题。根据第一段transparent wood可取代glass，可知是透明的木材。
33.C. 细节理解题。根据文章第二段 “…claims to be five times more thermally efficient than glass.” 和 “Residential building windows in particular account for 10–25% of the heat loss due to their poor thermal management capability” 可知，C不对。
34.B. 主旨大意题。全文主要介绍transparent wood相对于传统玻璃的优势。
35.D. 细节理解题。根据 “…which set out to find a greener alternative to conventional glass”可知，研究团队的初衷是找到可以替代传统玻璃的更环保的材料。