When he heard a cry for help, he ran out as as he could.
I asked two students the way to the post office, but of them knew.
At present lots of people would rather _______ in the country because there is ________ air pollution in the country.
He often tells us funny jokes. We are always made ______.
– What else should we pay attention to _______ building the bridge?--The change of the weather, I think.
— Jack, could you tell me for travelling this summer?—We plan to go and see the beautiful sea in Hainan.