4 Read and match. 1. Open your book, please! 2. Sit down, please! 3. A: May I come in? B: Yes, you can. 4. A: May I go out? B: No, you can't. 1 Let's write. 1. Open your please! 3. A: May I B: in? you can. 2. 4. A: May I b C d B: No, you Hom up, please! Vietnamese?
