问题
选择题
—Some young people like reading novels on their mobile phones after turning off the light at night.
—Don’t you think it is to their eyes?
A．helpful
B．helpless
C．harmful
D．harmless
答案
答案：C
题目分析：句意：许多年轻人喜欢在晚上关灯以后用手机看小说。难道你们不认为那对他们的眼睛有害吗？A. helpful“有帮助的”；B. helpless“无助的”；C. harmful“有害的”；D. harmless“无害的”。结合句意，故选C。