一单项选择题，选择每小题的最佳答案(20分) ( ) 31 Whats this? Its _ pen. A. a B. an C. the D. /( ) 32. Good morning, Alice. _. A. Thank you. B. How are you? C. How do you do? D. Good morning, Gina. ( ) 33 . Spell “color”，please. _. A. Yes, I do. B. Yes, I am. C. COLOR. D. Yes, C
