1. In order to make interplanetary flights in the future it is necessary to know factors affecting the human organism.
In order to make - выполняет функцию обстоятельство цели, т.к. инфинитиву предшествует союз in order.
it is necessary to know - выполняет функцию подлежащего т.к. инфинитив стоит после безличного оборота it is necessary.
2. The main purpose of the computers is to solve complex problems quickly.
is to solve - выполняет функцию составного именного сказуемого.
3. The Russian science was the first to make great contribution to the development of space technology.
was the first to make - выполняет функцию определения.
5 A: Would you like to come with me to the concert tonight?
2 B: I'd love to. Which concert are you talking about?
7 A: Have you seen big posters in the city? It's a concert of many musicians and popular groups.
9 B: I see. I hope they will have some jazz compositions on the list.
6 A: Why? Do you like jazz?
1 B: It's my favourite music genre. I don't like rock.
3 A: Neither do I.
8 B: I hope there will be something from pop music too.
10 A: So do L. If we don't want to be late, we should hurry up.
4 B: Let's go
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