Перевидите join two sentences together using "which" or "who" as in the example

Это значит,что нужно обьяденить два предложения вместе, используя "который" или "которые", как в примере.

Ican play the piano. - must we learn this poem by heart? - may i come in? - take the umbrella. it may rain. - can you swim? - we must wear our school uniform. - may i take your book? - may i ask you a question?   - he must be busy. - я могу играть на пианино. - должны ли мы выучить это стихотворение наизусть? - могу ли я войти? - возьми зонт. возможно, будет дождь. - вы умеете плавать? - мы должны носить школьную форму. - могу я взять вашу книгу? - могу я задать вопрос? - он должно быть занят.

Ithink it is impossible to live in our modern word without travelling because there are many interesting places to visit and see. railway and bus stations, airports and seaport are busier in summer than in other seasons of a year because of school holidays. travelling is the best way of spending holidays because you can visit different interesting places in your country and abroad. i prefer to travel by train because i like to look out of the  window and watch the nature and a lot of small towns and villages. of course, i usually travel with my parents because i am a teenager and my parents don’t allow me to travel by myself. i have already been in moscow, berlin, volgograd,  saratov. i have never been to london. it’s my dream. seaside is better to travel in summer because you can swim and dive, sunbathe and relax. my parents and i always take a camera with us when we are going to travel because we like to take photos very much. to my mind it is better to travel for pleasure because you may relax and don’t think about business.