Cho cặp chất sau 1. CO3,SO2 4.CuO,Fe2O3 2. SO2,MgO 5.Na2O,SO3 3. PgO5,K2O 6 CuO,CO Các cặp chất tác dụng với nước là A. 1,2,3 B. 1,3,5 C. 2,4,6 D. 3,5,6

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.