下列各句中，画线的成语使用正确的一项是（）

24. He is the first person you can think of to rely on, for he is always willing to ___whoever is in trouble.

下列各组词语中字形和加点字的注音完全正确的一项是

Can you guess ______ –The south. She prefers rice to noodles.

ns of youngsters across Europe could suffer ________ hearing lossafter five years if they listen to MP3 players at too high a volume for more than five hours aweek, EU scientists warned.