Unit7 单元检测题一.单项选择题(每小题1分, 共25分)( ) 1. How many birds can you see in the trees? I can see _________ birds in them. A. hundreds of B. five hundreds C. hundred of D. five hundreds of( ) 2. There will be ____ cars and ____ pollution twenty years later. A. many, few B. little, few C. less, more &nb..