Câu 20: Cách viết: "4 H 2 O"chi overline y gi? A. 2 nguyên tử hiđro và 1 nguyên tử oxi B. 8 nguyên tử hiđro và 4 nguyên tử oxi C. 4 hợp chất nước D. 4 phân tử nước

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.