—Ben and Sue aren’t home,are they?—No.They _____to London on business.
Don’t eat the fish. It smells ________.
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.