—Must I turn off the gas after cooking?—Of course. You can never be ____ careful with that.

——You don’t go to that supermarket quite often, do you? —— No, I only go there ______ because it’s too far away from my house.

Helen was much kinder to her youngest son than to the others, __________, of course, made the others envy him.

Pleasant music is often played       classes to make students refreshed and relaxed for a while.

.We admire her ______ her bravery.