Unit 5 What are the shirts made of?SectionA (3a-4c)I. 单项选择：（BC 层学生必做，A 层选做或不做）( )1. _________tea plants grown in Hangzhou?A.DoB. IsC. DidD. Are( )2. John finds ______difficult to climb to the top of the mountain in an hour.A. thatB. thisC. itD. one( )3. ---How do they...
