Cho `a=1/2\sqrt{\sqrt{2}+1/8}-\sqrt{2}/8` a , Chứng minh `4a^2 + \sqrt{2} a - \sqrt{2} = 0` b , Tính `S = a^2 + \sqrt{a^4+a+1}`

Choose the best answer.

I think you should buy _____  pack of mineral water instead. And you can also buy _____  snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______  cookies and soft candies.

Choose the best answer.

We should decorate our living room with _____ orange banner. We also need ________  ribbons, balloons, party hats and costume.

Choose the best answer.

I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.