HOC24
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A=\(\dfrac{7}{5}\)
P=A.\(\left(\dfrac{1}{\sqrt{x}+2}+\dfrac{1}{\sqrt{x}-2}\right)\)
\(\sqrt{x^2-4x+4}=1\)
30. They have just built a new bridge in the area
->A new bridge..................................................
31.People belive that many more people will die of skin cancer over the next ten years.
->That drugs.....................................................
28. People speak English all over the world
->Engish...................................................
29.Keeping the environment clean is very important
->It's...........................................................
26. We expect the professor will arrive this morning
->They professor....................................................
27. I usually stayed up late to watch football matches last year.
->I used to.............................................................