The difference between English sell and sale

sale,sell
He sold the old bike to me
The shoes shop is having a sale this week
There is a 30% discount on clothing
They sell the clothes at a discount of 30%.Clothing sale are Real Mall.30% discount.
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RELATED INFORMATIONS

1. The difference between sale and sell .
2. Sell, prices, very, clothes, they, at, good
3. They sell all their clothes at heir great s_____
4. They sell clothes at very good___
5. they wash their clothes c____
6. they usually sell thei clothes()a vey good price Hurry!
7. The cars______ yesterday sell very well.A.what I saw B.that I see C.what I see D.that I saw
8. 75.A third of the population of the city _______ their own cars. A,has B.have C.had D.is I choose a, 1 / 3, less than 1
9. ____ the high price ,demand for these cars is very high. A.Because of B.In spite of C.In case of D.Thanks to What should I do? Please translate and explain why the other options are wrong
10. those are their English cars.=______ cars of theirs are______ !
11. Should it be they always very busy or they're always very busy? Which one is it,
12. They always sell school things ___ a very low price in that shop .Let's go there. Ain Bfor Cat Don
13. they always sell their clouths at a very__ price A.tall b.big C.high D.well
14. I'd like some carrots and mounton___ mutton.
15. I don't like mutton ______ beef ,i don'tlike mutton ,______ I like bee a lot, The second blank is but
16. I would like some carrots and mutton_____ mutton
17. Look at that big tree!
18. have some beef and tea.
19. Can I have some fish
20. We have some fish