10. when i called at his house, they told me that he (leave) an hour before. 11. he was not happy about our choice, and asked who (interview) the applicants for the new position. 12. several years later i (be glad) that i (kept) that journal. 13. i knew that she (be unhappy) about the situation, but i also (realise) that if she (meet) keith face to face her attitude (change 14. he asked me where the price tag (be). 15. the manager asked how many people (apply) for the job.

Непонятно, в каком времени составлять предложения. некоторые могут быть в разных временах. это нужно указывать в задании.

10. had left
11. had interviwed
12. would be, kept
13. wii be unhappy, realise, will meet, will change
14. was
15 have applyed 

People have never travelled as much as today.
Some days ago no one can think that traveling will be as popular as it is now. It was very expensive and people prefer to relax in their countries.
Now it's comfortable to travel all around the world and you can chose where you wanna to go for one day. If you want to go somewhere by plane it will be more expensive but more comfortable. Or you can travel by car or speciall train.
By the way traveling is a good way to relax and just enjoy nature or see some different culture.

Гитара — струнный щипковый музыкальный инструмент, один из самых распространённых в мире. Применяется в качестве аккомпанирующего или сольного инструмента во многих музыкальных стилях и направлениях музыки, являясь основным инструментом в таких музыкальных стилях, как блюз, кантри, фламенко, рок-музыка, иногда джаз и др. Изобретённая в XX веке электрическая гитара оказала сильное влияние на массовую культуру.

The guitar is a stringed musical instrument, one of the most popular in the world. Used as an accompanying or solo instrument in many musical styles and trends of music, being the main instrument of such musical styles as Blues, country, flamenco, rock music, sometimes jazz, etc. Invented in the twentieth century, the electric guitar has had a strong influence on popular culture.