The effectivity column shows parts connections to units or assemblies which are almost the same but have small differences. These units or assemblies have reference letters such as A, B, C, etc.

After a tiring day, I felt （         ）out.

The Pope is the （         ）leader of the Catholics.

Your explanation is too general to understand; you should try to be more （        ）.

She married a man （         ）in mechanical engineering.

Because of his poor （       ）skills, Nick has very few friends.

Jane just moved here, and she tried to be （         ）to everyone, being friendly; and willing to talk to others.

She seldom plays basketball, so she isn＇t （         ）at playing it.

Albert Einstein, the author of the Theory of Relativity, made a （         ）contribution to physics in the twentieth century.

She is absent from school today because she is suffering from a （         ）toothache.

These two brothers had been （         ）for 40 years before they met again last week.