I. 单项选择(满分25分). 1. According to a new study by a British university, learning _____ second language can lead to _____ increase in your brain power. A a; the B /; the C a; an D the; an 2. -- Do you think I should study physics or French ? -- __________. A. It’s your own decision B. It’s up to you C. None of my business D. That’s all right 3. The room he lives in now is _______ the one he used to live in. A. twice bigger B. twice the size of C