Jim sees two boys running.
"Why are they running?" he asks Ben.
"The boy who comes first gets the prize," says Ben.
"Now I see. But why is the second boy running?" asks Jim.
"Mr Brooks is quite a linguist, isn't he?"
"I never knew it."
"Oh, yes, he knows three languages."
"What are they?"
"Boxing, tennis and basketball."
Ken: Can you tell me what Kate is doing?
Jane: Certainly. If the ice is thick, she is skating, but if the ice is thin, she is swimming.
The funniest joke is A.