Use gerunds instead of subordinate clauses. Mind the prepositions to go with the gerunds. 1. When you consider the question, don't forget to use latest information on the subject (in).
2. When the delegation completed on tour over the country, on left for home (on).
3. When I heard that Mike had been taken ill, 1 agreed to substitute for him (at).
4. Before you go to visit the Parkers, make sure they are at home (before).
5. One can improve one's pronunciation if one works with a tape recorder (by).
6. You will never have a good command of a foreign language unless you learn its grammar.
7. After Prof. Lake made a few additional experiments, he obtained some new information (after).
8. The students developed their speaking skills because they practiced their English every day (through).

1 Modern means of transport are efficient and relatively cheap, they are the reason we can travel almost anywhere in the world in a matter of hours. It has become possible for us to see other countries, learn about their cultures and experience their lifestyle. It sounds good but, as always, there is a downside.

2 On the one hand, traveling broadens our mind. For example, we can see historical monuments with our own eyes and learn about past civilizations. We can almost experience history by actually visiting historical places.  

3 On the other hand, we all know that cars, airplanes and trains cause serious harm to the environment. They pollute the atmosphere of our planet and make the problem of global warming even more acute. There are fewer and fewer clean and beautiful places to go to in the world

4 However, it is always possible to find a compromise. We don’t have to cross the ocean to spend some time at the seaside or to see an ancient monument. There are sandy beaches and historical places closer to home

5 Personally, I would much rather go for a walk in the countryside or enjoy a ride on my bicycle. Our country is so beautiful that I wouldn’t want to leave it even for a short time  

Объяснение:

Вы: Hi, it's (ваше имя) here! Have you done your homework?

Ваш друг: Yes, I have. Why did you ask?

Вы: My family and I are going to the museum. Do you want to come with us?

Вд: I don't mind, but…will your brother be with us?

Д: Oh, I forgot, that you don't like him. But, don't be upset: there also will be my stepsister.

Вд: Stepsister?

Д: Yes, she have a long blonde hair and green eyes.

Вд: Wow, I think she's pretty nice!

Д: Okay, so lets meet in a front of our school.

Вд: Good, bye!

Д: Bye!

надеюсь, всё правильно, удачи!