A： Shall I take my swimming suitB： No, you . We will go hiking in the mountain.

Have you finished your homework– _________ . Just half of it. How about you

下列各句中，加点的成语使用恰当的一项是（ ）

Occasions are quite rare ____I have the time to spend a day with my kids.

His father is a professor and has beenteaching in the university for more than twenty years — _____