ko được spam nữa

ko spam mà 

$\frac{2\sqrt{5}-7\sqrt{15}}{2-7\sqrt{3}}+\frac{31}{6+\sqrt{5}}$

$=\frac{\left(2-7\sqrt{3}\right)\sqrt{5}}{2-7\sqrt{3}}+\frac{31\left(6-\sqrt{5}\right)}{36-5}$

$=\sqrt{5}+\frac{31\left(6-\sqrt{5}\right)}{31}$

$=\sqrt{5}+6-\sqrt{5}$

$=6$

alo

alo

1. His parents enjoy reading newspaper.

=> His parents are interested in....reading newspaper.........

2. It's necessary to do the homework.

=> You........must do your the homework...............................................

3. There is a big market near her house.

=> Her..........house is near..................................... a big market.

HOẶC 

1. His parents enjoy reading newspaper.

=> His parents are interested in..reading newspaper..........

2. It's necessary to do the homework.

=> You...must do your homework before going to school................

3. There is a big market near her house.

=> Her...house is near........ a big market.

1.B

2.A

3.B

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