Dãy nào sau đây gồm tất cả các chất đều là muối? KCl, NaOH, ZnSO4. CaCO3, BaCl2, NaNO3. H2SO4, CuCl2, Al2(SO4)3. Na3PO4, Ca(OH)2, HCl.

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.