Teacher: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Teacher: Now, understand the problem? If you are still confused, see the following example:
For four years we have waited expectantly for the pitter patter of tiny paws. Soon, that wait could finally be over. Tian Tian, the UK's only female giant panda, has conceived and could give birth to a cub as early as August. However Edinburgh Zoo, where the pandas live, have warned people 'not to get too excited' as the process is 'extremely complex'. Moreover, on the two previous occasions keepers inseminated Tian Tian - whose name means 'Sweetie' - she has failed to produce a panda cub. She was artificially inseminated again in March this year, but keepers at the zoo say implantation - when a fertilised egg attaches to the uterus - has not yet occurred.Tian Tian has conceived and could give birth to a cub as early as AugustShe has been inseminated twice before but so far failed to produce a cubTian Tian and Yang Guang arrived in 2011 from China to great fanfareOn loan at £600k a year, became first giant pandas to live in UK for 17 years 
 Questions:Under the terms of the agreement any cubs will return to _ at the age of two, the age at which they would normally leave their mother in the wild.
Solution: China
Reason: This is a good example. Based on the passage, any cubs will return to China at the age of two

Now, solve this instance: It is just over one month until the New Horizons spacecraft arrives at Pluto on 14 July - the first ever visit to the dwarf planet and one of the most anticipated space missions this millennium. And its impending arrival has caused the Plutonian system to be cast under more scrutiny than it ever has been before. Now, in the latest research, astronomers have taken the most detailed look at its moons - and found some surprising results, namely that they have chaotic rotations and strange surface compositions. The study, carried out by the University of Maryland, examined how Pluto and its large satellite Charon interact with the four smaller moons - Kerberos, Styx, Nix and Hydra.University of Maryland study revealed characteristics of Pluto's moonsMost of the moons were found to have chaotic, tumbling rotationsBut, surprisingly, they seem to be in stable orbits around Pluto and CharonAnd four of the five moons appear to be as bright as white sand 
 Question:The moon _ is almost half the size of Pluto, and it is so big that Pluto and Charon are sometimes referred to as a double dwarf planet system.
Student:
Charon