Many of us love traveling, but lack of financial _________ often holds us back from seeing the world.

I looked for the key ______ the door, but I didn’t find it.[ ]

My little brother was born _______ a rainy day _______ summer, and our family name is exactly “Xia”. So we call him “Xia Yu”. [ ]

What is a telephone used _____, class? [ ]

I’ll teach you with my guitar, and you can borrow ­­­­________ for practice.