Помогите пожалуйста!  Заранее огромное спасибо!
Бассейн площадью 50 м2 заполнен водой (плотность воды – 1000 кг/м3) до уровня 3 м и разделён пополам подвижной
вертикальной перегородкой. Перегородку медленно передвинули так, что она
разделила площадь бассейна в соотношении 1:3.
Какую работу (в кДж) пришлось при этом совершить? Вода не проникала через
перегородку и не проливалась через край бассейна. Ускорение свободного падения 10 м/с2. 

Complete using the words in the box. 
already • before • ever • for • just • rarely • since • so • still • yet
1 Have you ...dreamt of winning the lottery?
2 I haven't worked out how to set the timer on the video ...
3 My dad's lived in the same house ...he was born.
4 The film's only been on ...a couple of minutes.
5 Bruce has knocked three men out of the competition ...far.
6 I ...get the chance to get any exercise - I'm just too busy.
7 He's only....got home.
8 It's eleven o'clock and Todd ...hasn't come home. Where could he be?
9 I've never met Ruth ...What's she like?
10 Have you finished ...That was quick!

 Find the extra word in each line.
International friends

1 ...I've been to travelling round European summer. It's the first time I've
2 ...ever been going abroad, and I've had a fantastic time! I've seen
3 ...loads of interesting places and I have to also made loads of new friends.
4 ...I've been decided to stay in touch with them now I'm back. One of
5 ...them, Giselle, is French. She was making on holiday too. We now send
6 ...text messages are to each other all the time.They're usually in English
7 ...because my French isn't very good! I'm planning to have visit her in
8 ...France next year sometime. I hope I can. I am love meeting people from
9 ...other countries! I want to have had lots of friends from all over the world!
10 ...Travelling certainly broadens the mind, but it also is broadens your circle of
friends!