下列各句中，没有语病或语意明确的一句是（ ）

Why are you so crazy about music— Because I can always find in music _____ peace that is missing in _____ world full of challenges.

On Sundays I prefer shutting myself in and listening to music all day on Sundays—That’s I don’t agree You should have a more active life

How do you learn English words-__________making flashcards.

Though it was midnight, she found her daughter sitting at the dest, completely ________ her homework.