Your mother prepared delicious food for us yesterday. Please say thanks ____ her.

Did they have fun _______ the summer Palace ?—Yes. They really enjoyed themselves there.

There are two windows _______ the wall and one picture _______ the wall. [ ]

Have you ever been to Disneyland?–Yes. I ________ there last summer.

What’s the meaning of “by mistake?”—It’s “____”. [ ]