The professor ______ sit in his study for hours when he worked on the new project.

hool rule states that no child shall be, unless byan adult, allowed out of the school during the day

My child didn’t feel quite himself these days. The doctor said it was just a flu. What __________!

We ________ such great achievements without your efforts. Thanks a lot.

26．Nowadays people have to pass various tests for professional__________ so that they can be qualified for a well-paid job.