Câu 2: Các cặp khí ẩm nào dưới đây được làm khô bằng CaO (calcium oxide): A. H2; O2 B. H2; CO2 C. O2; SO2 D. SO2; HCl Các bạn giải thik hộ mik tại sao chọn A đc ko ạ (Hứa vote+tim+ctlhn)

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.