cho các chất sau ZnO Fe BaO Na2SO4 hãy điền vào chổ trống a. _____ + H2O______Ba(OH)2 / b.HCL+_________ _____ Fecl2+ H2 c.NaOH + H2SO4 _____ ______ + H20 d.Zn(OH)2 -> ____ +H20

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.