Переведите на язык, ставя глагол в present simple passive

Present Perfect, Past Simple, Past Continuous или Past Perfect. 1. They (told) me yesterday that you (had got) an excellent mark. 2. When did you (receive) a letter from your friend? 3. Our grandmother (was cooking) dinner from twelve till three yesterday. 4. Look! What beautiful flowers she (is buying)! 5. They ( travelled) along the coast of Africa last year. 6. We (have not  seen) each other for ages. 7. They (have  eaten) all the apples which I (brought). 8. When the children (had had) dinner, they (went) for a walk. 9. Last summer we ( lived) in the country and (went) to the river every day. 10. My sister ( spent) a lot of money yesterday. 11. She is so upset: she (has lost) the key to the front door. 12. By the 1st of September all the children (had returned) from the country. 13. Columbus ( discovered) America 500 years ago. 14. Columbus (did not  know) that he (had discovered) America. 15. I have already ( read) five English books. 16. He (had discussed) the problem with a lot of people before he (took) a decision. 17. Mother (has baked) a delicious cake! Sit down at the table and let's eat it! 18. She (was reading) an English book the whole evening yesterday. 19. I have never ( been) to Greece. 20. Have you ever ( been) to the Niagara Falls? 21. At this time yesterday they (were sitting) on the sofa and (listening) to their grandmother who (was telling) them fairy-tales. 22. My friend has just ( rung) me up from London. 23. I (was standing) at the tram-stop when it ( began) raining. 24. We (have not  skated) since last winter.

Baobab - a kind of tree. Baobab - one of the thickest tree in the world. The average circumference of the barrel in the baobab is 9-10 meters, with the height of the tree is in the range of 18-25 meters and the diameter of the crown reaches 40.
From October to December baobab blossoms. Flowers in the baobab large, white with five petals. They are disclosed in the late afternoon and last only one night. In the morning the flowers wither, acquiring an unpleasant putrid odor, and fall off.
Following the developing fetus, which resemble cucumbers coated with a thick hairy skin. Inside the fruit are filled with pulp with black seeds. The fruits are edible.Because of addiction to them baobab monkey called "monkey bread tree."
The average life expectancy of baobab "only" 1,000 years.
Local residents have been used almost every part of the baobab. 
From its rough bark produce fiber for the manufacture of fishing nets, ropes and fabrics. From the ashes of the bark of baobab are quite effective medicine against colds, fevers, dysentery, heart disease, asthma, toothache, insect bites.
Young leaves are added to salads, used as dry spices. Young shoots are boiled like asparagus.
Flower dust used to make glue.
Baobab - a treat for elephants. African giants eat them almost entirely, not just the leaves and branches, and trunk. The oldest baobab 6,000 years