failed over and over again in my life, but I stick to my goal. And that’s I succeed.

下列加点字的注音都正确的一组是（ ）

Mr. White, will you please teach me how to perform pair skating today?– . You have to practise single skating well first.

Hearing the news about the crash of Air France Flight 447, he became very concerned _______ his daughter on board

When a storm is just ________，we must fix up the roof to prevent it from________.[ ]