Unit 2 练习题(3)一、Read and choose.(选择) ( ) 1. Their hair long. A. are B. is C. not ( ) 2. Who _________ fast? A. swim B. swimming C. swims ( ) 3. Who sings _________ than Tim? A. well B. better C. best ( ) 4. _________ ruler is long? A. Who B. Who’s C. Whose ( ) ...