Waste paper shouldn’t _____ everywhere. It’s our duty to keep our classroom clean. A. be thrown B. throw C. is thrown
--______ are they? --They are my ______.
--________ your friend? -- He is OK.
--What’s that ______ English? --It’s a bookcase.
Here ______ two tapes on my desk.
I’m _____, but Tom isn’t. His books are everywhere.