Ⅰ.单句语法填空
1．Devoted(devote)to his research work，the professor cared little about any other things.
2．Helen Keller became deaf and blind when she was 19 months old，but she never gave up and struggled to lead(lead)an active life.
3．It's necessary that couples (should) respect(respect)each other in their daily life.
4．On average，people who don't smoke are healthier than people who do.
5．She used to be a manager in a company，so she is experienced(experience)in management.
6．Both sides expressed satisfaction(satisfy)with the progress so far.
7．Thanks to my English teacher's encouragement(encourage)，my English has improved a lot.
