Mind your steps, guy! Don’t you see the words “_______ the grass”?—I’m sorry.

What did you do ______ your last day off? —I took my dog ______ a walk.[ ]

During the last 3 years, the students ________ more than 2000 English words.

When my mother ______ home, I was making some cards.

“How many students have visited The Summer Palace?” “ .”