Before selecting the curtain for your newly-decorated house，it’s important to know what colors look great _______ the wall paper．

The Great Wall is familiar ______ the people all over the world.[ ]

We really don’t know _________ with our problems in learning English.

Talking loudly in a library is impolite.—In fact, we should also take care not to cough or sneeze loudly in public.

Whose sweater is this? —It looks like John’s. Oh, yes. It’s __________.