单选题 It is more difficult________people who are naturally shy________become effective public speakers.
【正确答案】 C
【答案解析】让天生害羞的人成为高效的公共演说家更困难。本题考查固定句型。It is+形容词+for sb. to do sth. 是固定句型,意为“对于某人来说,做某事是很…”。故选C。