Fill in each gap of the following sentences with a suitable preposition 16. I had a very good time …………………..my classmates last weekend 17. Lien was absent …………………….class 2 days ago 18. Sometimes I have to walk to work and sometimes I go ………………bus 19. I am not worried …………..her because she can take care …………………herself 20. Thank you ………………coming to visit us

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