Complete the sentence with the correct part. Alain has climbed over 85 of the tallest structures in the world, including the Eiffel Tower, the Empire State Building and the Petronas Twin Towers in Malaysia. One of his first climbs was at the age of twelve. He didn't have his flat keys and his parents were out, but he was able to climb up the outside of the building - seven storeys high - and crawl through a window. When he was young, Alain climbed up to his flat because

Для решения данного задания необходимо выбрать один из предложенных вариантов, который логически завершит предложение. Рассмотрим каждый из вариантов:

1. it was the only way he could get in.
2. his parents lost their key.
3. he wanted to see if he could do it.
4. his parents encouraged him to do it.

Наиболее логичным завершением предложения будет первый вариант, так как в тексте указано, что у Алена не было ключей, и его родители отсутствовали, поэтому единственный способ попасть в квартиру - залезть через окно.

Ответ: it was the only way he could get in.