— It is a red-letter day for me. I won the first prize in the school competition contest.— Really? Well done!
Jack likes to sit ________ the back of the bus.
---- What are you doing?---- I’m ________ my English book.
I borrow a book from my friend and I can ________ it for a week.
---- ________ class are you having? ---- Math.
I don’t like physics ______ it’s too difficult for me.