Раскройте скобки, выбрав правильную форму. 1) Many different languages (to speak) in the world. 2) We (to sell) a lot of equipment recently. 3) Our economists (to visit) the exhibition now. 4) How (many/much) people work here? 5) He (to spend) some time in the UK last month. 6) I will be happy, when I (to pass) my exams.

1)  are spoken
2) have sold
3) are visiting
4) how many  people are  work here
5)spent
6)pass