Điền công thức hóa học phù hợp vào chỗ trống sau rồi cân bằng, viết trạng thái cho mỗi chất. A).....+ HCl —> NaCl + H20 B) Ca(OH)2 + ........—> CaCO3+ H2O C) H2SO4 + .......—> CaSO4 + CO2 + H2O D) ZnCl2+ AgNO3—>...…+ Zn(NO3)2

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.