Complete the sentences with who, which or whose only where it is necessary. Add any commas that are needed. Example Canberra, which is a small town, is the capital of Australia. 1. The most successful television soap ever made must be Dallas ... first appeared in the late 1970s. 2. Did you see the Frenchman restaurant ... we went to on Sunday? 3. She is the girl ... we spoke to. 4. The Sahara ... is almost as big as the United States is the world's largest desert. 5. The boy ... you saw at the window is my brother. 6. I bought a book ... I read when I got home.

1. When was Andrei Sakharov born? - He was born in 21 May, 1921 in Moscow. 
2. Where was Andrei Sakharov born? - He was born in Moscow. 
3/ When did he graduate from the ubiversiy? He graduate from Moscow State University in 1942
4/ Where did he start to work after graduating from Moscow State University? He started his work in physics. 
5/ By what age was he one of the world's most famous scientists who lived in Russia? By the age of 32.
6/ When did  A. Sakharov become the youngest academician in Russia? In 1953.
7/ When did he decide to devote himself to fightingagainst future atomic wars? And at the end of the 50s.
8/ When duid he win the Nobel Peace Prize? In 1975.
9/ When did Sakharov participate in the International Conference againstatomic wars? In December 1987.
10/ Where did the Conference take place? The Conference took place in Moscow.
11/ When did A. Sakharov start his official career as a member of Russian Parliament ? In 1987.
12/ Is A. Sakharov the author of several books on progress and freedom all over the world? Yes, he is.
13/ When did he die? On the 14 of December, 1989.