I need something for cutting the paper. — Oh, you want a knife? OK, I’ll get ______ for you.

______ is Yiwu River?—About forty kilometers.[ ]

I’m ______ duty today. I must clean the classroom ______school. [ ]

_______ of the materials I listened to at the beginning of the exam _______ easy.

How long has your grandpa ______?－For about 3 months.