4complete the text. use the present perfect or the past simple.
brian is really good at volleyball and he's got lots of friends who play it with
him. he's known (know) some of them for five years. when brian
- (meet) his friends, he
(not know) how to play.
his friends
-(tell) him to go with them to their club and they
(teach) him how to play. soon, everyone (want) him
to be on their team. now, ) on the team for three years and
(play) in lots of matches.
hes
!

Микроскопические пешеходов ДНК были разработаны в но они так и не продвинулись более чем на три шага. Эти них может управлять целых 50 шагов, что означает возможное расстояние пешком около 100 нанометров. Принимая до одного часа, чтобы закончить, это больше похоже на марафон для нано-паука. Тем не менее, исследователи надеются, чтобы имеют возможность сделать пауки идти быстрее и дальше в будущее. Кроме того, данное исследование фокусируется на том, что нано-пауки в состоянии следовать несколько команд и принимать больше решений.
Как то так Удачи

1) The world's greatest sports games are the Olympic Games.
2) The Olympic idea means friendship, fraternity and cooperation among the people of the world.
3) The Olympic emblem is five interlinked rings: blue, yellow, black, green and red. 
4) Because any national flag contains at least one of these colours.
5) The original Olympic Games began in ancient Greece in 776 B.C. 
6) The games were for men only. Greek women were forbidden not only to participate but also to watch the Olympics.
7) The first modern Olympic Games were held in Athens in 1896.
8) No, they aren't. The Olympics are held every fourth year in different countries.
9)  In 1924 the first Winter Olympic Games were held in France.