Underline the correct tense

Underline the correct tense.
1 The plane leaves/has left at four o'clock. We must be at the airport by two o'clock.
2 It gets/is getting colder and colder every day.
3 Have you seen Linda? I have been looking/am looking for her for almost an hour.
4 Sam is a very interesting person. He knows/has known all kinds of unusual facts.
5 First, you are heating/heat the oven to a temperature of 180°C.
6 Have you heard the news? They have just elected/ have been electing a new club chairman!
7 Martha is finding/has found a new job. She is starting next week.
8 The teacher has been correcting/has corrected essays for three hours.
9 Michael's car broke down last week, so he uses/is using his father's for the time being.
10 It rarely gets/is getting very hot in Britain.
2 is getting 7 has found
3 have been looking 8 has been correcting
4 knows 9 is using
5 heat 10 gets
6 have just elected