I’d lived next door to Debbie and her 84-year-old  23  , Nan, for about six months, and we’d become fast friends. Debbie always worked at night. She  24  leaving her mom alone, so she asked if it was okay if she rigged (装配) up one of those baby monitors and  25  me a receiver.

   “Not a problem,” I said.

One night last summer, my neighbor Debbie came over and knocked on my door. “I’m leaving for   21, Jim,” she said. “Would you mind dropping by my house in a bit and   22 on my mother?”

第三节：完形填空 (共20小题；每小题1.5分，满分30分)

A. so                B. even              C. yet                D. thus

20. The new machine, as is put in the report, will work twice as fast, _______ greatly reducing costs.

A. terms              B. pace              C. progress            D. touch

19. In a time of social reform, people’s state of mind tends to keep _______ with the rapid changes of society.

A. where              B. as                C. who               D. that