_____, he has a lot of knowledge about computer.
John is the tallest boy in the class, _______ according to himself.
If it is quite _______ to you, I will visit you next Tuesday.
Bob ran the 100 meters in 9.91 seconds, and I have not seen _________ this year.
My mother always gets a bit _________ if we don’t arrive when we say we will.
At times, worrying is a normal, ________ response to a difficult event or situation --- a loved one being injured in an accident, for example.