That town; those cities; those songs; that star; those pupils
[Всё очень просто: that используется со словами в единственном числе и переводится как "тот", "та", "то"; а those - сугубо со словами в множественном числе (пер. как "те")]
II.Some seeds; one tail; one day; many stars; apples; an orange
[Добавляем или убираем окончание -s/-es]
III.1) he
2) he
3) they
4) they
5) she
[Тоже всё просто: переведите на русский язык, если непонятно; в зависимости от рода слова, ставим или he (он), или she (она), если "они" - they]
The observatory was commissioned in 1675 by King Charles II, with thefoundation stone being laid on 10 August.[1] At that time the king also created the position of Astronomer Royal, to serve as the director of the observatory and to "apply himself with the most exact care and diligence to the rectifying of the tables of the motions of the heavens, and the places of the fixed stars, so as to find out the so much desired longitude of places for the perfecting of the art of navigation." He appointed John Flamsteed as the first AR. The building was completed in the summer of 1676.[2] The building was often given the title "Flamsteed House", in reference to its first occupant.
The scientific work of the observatory was relocated elsewhere in stages in the first half of the 20th century, and the Greenwich site is now maintained as a museum.