单选题 Some ancient people were able to tell the time by the shadow______by the sun on the slate.
A. thrown
B. flung
C. cast
D. tossed

【正确答案】 C
【答案解析】[解析] 四个选项中，A项throw v. “投，掷”；B项fling v. “投，掷”；C项cast n. “投影”；D项toss v. “投，掷”。译文：一些古人可以根据投在木板上的太阳投影辨别时间。