.I don’t think _____ possible to master a foreign language without much memory work.
John was dismissed last week because of his ______ attitude towards his job.
My morning ______ includes jogging in the park and reading newspapers over breakfast.
Since Tom ______ downloaded a virus into his computer, he can not open the file now.
At minus 130℃, a living cell can be ______ for a thousand years.
The traditional view is ______ we sleep because our brain is “programmed” to make us do so.