Có sơ đồ chuyển đổi hóa học sau: NaCl → B → C → CuO. Dãy chuyển đổi nào sau đây là phù hợp? A NaCl → Cu(OH)2 → CuSO4 → CuO B NaCl → CuSO4 → Cu(OH)2 → CuO C NaCl → NaOH → Cu(OH)2 → CuO D NaCl → CuSO4 → CuCl2 → CuO

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.