I found _________ hard to make myself understood by the old man.

I need some red ink badly, but there’s _____ at hand.

Haze (雾霾)appears around us. Let’s do ________ helpful to protect the environment.

I like a house with a beautiful garden in front, but I don’t have enough money to buy ____.

---What can I do for you,Sir?---- I’d like a bag of rice, for I have _______ at home.