Fill in the gaps with the correct form of the verbs in brackets. 
1. London is the capital of the UK. It is worth ______(to visit).
2. A man ______(to launch) into space for the frist time in 1961.
3. I ______(to live) in Paris for three years. 
4. Mary _______(to done) her homework. You may check it. 
5. I ______(to go) to the Crimea last summer. It was great!