2017高考英语阅读理解解析版汇编（136）
（2016高考训练）阅读下列材料，从每题所给的选项中选出最佳选项。
A black hole is a place in space where gravity pulls so much that even light cannot get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.
