1. What is implied when the narrator says that, upon hearing of his mother's death, Yukio "heard a tautly stretched string snapping inside his head" (66)?
(a) He decided that there was no longer any reason to strive to repay his debt.
(b) He realized that nothing more prevented him from committing suicide.
(c) He felt deep shame at having stayed away from his mother for so long.
(d) He was enraged at Kyoko's duplicity and wanted revenge.

2. Who saved Yukio's life by performing CPR on him when he nearly drowned?
(a) Kinuyo.
(b) Kyoko.
(c) Seiichi.
(d) A passerby.

3. What new café rule does the reader learn about in "Mother and Son"?
(a) There is no way to slow the cooling of the coffee.
(b) There is no way to control where in the past a time-traveler ends up.
(c) People in the past cannot accept physical objects from time-travelers.
(d) People in the past cannot be photographed by ordinary cameras.

4. How does Kyoko react to Nagare's suggestion about a present for Kiyoshi's wife?
(a) She laughs and tells Nagare he does not understand women.
(b) She praises it effusively, saying she wishes her husband thought like Nagare.
(c) She dismisses it as completely unhelpful.
(d) She politely suggests a slight improvement in the plan.

5. Why does Gohtaro hesitate to enter the café?
(a) He is not sure that he wants his daughter to know the truth.
(b) He is not sure that the stories about the café are true.
(c) He is afraid that going back in time will be dangerous.
(d) He is afraid that seeing his old friend will be too sad.