当你的同学拿着3本书，问你这是多少本书时，你的回答应是：A. Four books .B. Three books .
—，where's the book? —I'm sorry. I don't know. A. Excuse meB. I'm sorryC. Sorry
Wehaving an English lesson. A. /B. areC. can
Let's read. A. bookB. a bookC. the book
—Happy birthday! —. A. Excuse meB. No，I'm not happyC. Thank you
—I come in? —Come in，please. A. DoB. AmC. May
，where's the book?
having an English lesson.
.
.
I come in?
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