They come from the USA. They are _______.A.Chinese B.America C.Americans D.China
---- 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.
---- It’s time _____ lunch. ---- OK. Let’s _____.