Dãy chất phản ứng với Ba(OH)2 : A. H2SO4 , NaCl , CaCl2 , AlCl3 . B. CuCl2 , H2SO4 , CaCO3 , CuO . C. Na2SO4 , HCl , CO2 , FeCl3 . D. H2SO4 , Na2SO4 , CO2 , MgCl2 .

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.