Прочитайте текст и заполните пропуски 13–18 словами, напечатанными в правой колонке под цифрами 1–8. Каждое из этих слов может быть использовано только один раз. В ответе укажите цифры, под которыми значатся выбранные Вами слова. Два слова в этом списке 1–8 лишние.

1) study
2) loud
3) protect
4) regular
5) measure
6) raise
7) predict
8) technical

Studies of the atmosphere
Studies of the atmosphere first received 13 ______ support in 1912. Equipment to 14 ______ temperature and pressure was invented in Germany. But the question was how to 15 ______ it high into the air. In 1921, Russian engineers suggested using planes. The special equipment was put on planes that made 16 ______ flights. Thanks to this, scientists got a lot of new information about the structure of the atmosphere. Nowadays scientists use modern flying laboratories to 17 ______ the structure of clouds at different levels. Unlike the first planes, these laboratories can work in any weather and are able to 18 ______ climate changes.