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an old turtle.B. Yes, it’s a turtle.19. —Can it walk? ( )—______________A. Yes, it is.B. Yes, it can.20. —Is she a thin girl?—_______ A. Yes, she is.B. No it isn’t.5. Read and choose. (選擇正確答語)A. No, she isn’t.B. Yes, it can.C. You’re wele.D. No, it i