This math problem is so hard that I can't ______ .Please give me some advice.A. look out it B. work it out C. give it out
---Is Lingling’s grandmother cooking the meal?---No, she 。
At this moment , John ______ lunch.
--- Listen ! Who _______in the room? ---Let’s go and see.
He is taking ______ now.
They are having _______ dinner at home.