He walks to school  .

I often hear my sisterin her room. Listen! I hear her an English song now.

The maths problem ishard me work out.

I saw a girla mobile phone me.

—Last month.

—Has he ever read it?

—Yes. He(read) it here at this time yesterday afternoon.

—Whenhe(return) the book?

—Maybe next Monday.

—Sorry. I            to my friend on the phone.