Answers:The suitcase/the trophy.
Joan made sure to thank Susan for all the help she had [given/received]. Who had [given/received] help?
Paul tried to call George on the phone, but he wasn't [successful/available]. Who was not [successful/available]?
The lawyer asked the witness a question, but he was reluctant to [answer/repeat] it. Who was reluctant to [answer/repeat] the question?
Answers: The witness/the lawyer.
The delivery truck zoomed by the school bus because it was going so [fast/slow]. What was going so [fast/slow]?
Answers: The truck/the bus.
Frank felt [vindicated/crushed] when his longtime rival Bill revealed that he was the winner of the competition. Who was the winner of the competition?
The man couldn't lift his son because he was so [weak/heavy]. Who was [weak/heavy]?
Answers: The man/the son.
These types of questions are known as Winorgad schemas. Current AI success rate is barely above 50%, almost random guess. Adult human can easily get 100%. 8 years old can probably get 90% or so.
It is much harder for AI than Turing test. Effectively, it is better replacement of it. (What is the replacement for what? :)
More Winograd schemas here: http://www.cs.nyu.edu/faculty/davise/pa