Unit 8 We’re twins!习题一.选择正确答案填空。( ) 1. May I have orange ? A. a B. an C. some ( ) 2. How many ____ do you have ?A. pens B. crayon C. pen . ( ) 3. This my friendA. are B. am C. is ( ) 4. How many kites can you see? I ___see 12 kites.A. am B. is C. can二.阅...