в предложении What (has или have) happened to the boy? - I don't know.

Норвежский язык?

1.(Have или Has) you watched the new film about Harry Potter?-Not yet.
2. Theere of the student (have или has) already finished the test.
3.Look at the players! I think they (have или has) never played hockey.
4.They (have или has) just arranged the date and time.
5.What (have или has) happened to the boy?-i don't know.

1)....you watched the new film about Happy Potter?-Not yet.
2)Three of the students.......already finished the test.
3)Look at the players! I think they ....never played hockey.
4)They.... just arranget the date and time.
5)What....happened to the boy?-I dont know.

переделайте предложения вот пример
0.People think that the Scandinavians are reserved and slow.
The Scandinavians are thought to be reserved and slow
1.Many people consider that Spain and Portugal are good places for summer vacations.
2.We know Christmas is the most popular holiday in Britain and the USA
3.Many people think that patriotic symbols are very important for national celebrations.
4.They say that Thanksgiving Day unites many American families for a thanksgiving dinner.
5.Some people suppose that the British Queen is the most important symbol of the country.
6.Many people consider that British football is the best.
7.They say Americans have more national celebrations that any other nation

Fill in have or has:
пример:has she chosen the book
1).......you watched the new film about harry poter
2)three of the students .... already finished the test
3)i think they ... never played hockey
4)they ... just arranged the date and time
5) what ... happened to the boy