_______ the sun sinks lower, shadow spread ________ the courtyard.
A. When; through B. When; across C. As; through D. As; across
_______ the sun sinks lower, shadow spread ________ the courtyard.
A. When; through B. When; across C. As; through D. As; across
B
前句为时间状语，后句为扩散到-----,此处有漫过、穿过之意。