1. Please turn off the radio, I can't concentrate on my work.

2. Quick! Get on the bus. It's ready to leave.

3. I don't know where my book is. I have to look for it.

4. It's dark inside. Can you switch on the light, please?

5. Fill in the form, please.

6. I need some new clothes. Why don't you try on these jeans?

7. It's warm inside. Take off your coat.

8. This pencil is really old. You can throw it away.

9. It's so loud here. Can you turn down the radio a little.

10. The firemen were able to put out the fire in Church Street.

11. Does your little brother believe in ghosts

Một dung dịch chứa a mol H2SO4 hòa tan hết b mol Fe thu được khí A và 42,8 g muối khan. Cho a : b = 6 : 2,5. Tìm giá trị a, b

\(\text{Cho }\left(a+2\right)\left(b+2\right)=\frac{25}{4}\)

\(\text{Tìm Min }F=\sqrt{a^4+1}+\sqrt{b^4+1}\)

\(\text{Cho a, b, c }\ge0\text{ thỏa mãn }a+b+c=1\)

\(\text{CMR: }a\sqrt{a}+b\sqrt{b}+c\sqrt{c}\ge\frac{\sqrt{3}}{3}\)

\(\text{Cho a, b, c}\ge0\text{ thỏa mãn }:\text{ }a+b+c=1\)

\(CMR:\text{ }a^4+b^4+c^4\ge\frac{1}{27}\)