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 first time in 1961.



3​ I ________ (to live) in Paris for three years.



4​ Mary ________ (to do) her homework. You may check it.



5​ I ________ (to go) to the Crimea last summer. It was great!



6​ My mother ________ (to cook) supper by 6 o'clock yesterday.



7​ The new rules ________ (to explain) to the students tomorrow.



8​ Listen! Somebody _______ (to play) the piano in the next room.



9​ We _______ (to work) without a break since 8 o'clock in the morning.



10​ Nick is an artist. He ______ (to draw) these beautiful landscapes last week.