Your friend, Jimmy, is iii, you want to visit him after working, but you can’t. Please write a note to him, tell him the reason why you can’t see him. Marks will be awarded for content, organization, grammar and appropriateness.

A．determined
B．caused
C．maintained
D．achieved

A．those using logic are not always logical
B．mysteries can always be solved by using logic
C．detectives can never be trusted
D．guilt can always be proved scientifically