We had a lot of fun________tennis.
-Why does the river smell terrible?-Because the water_______.
一Have you read today’s morning paper? -Not _______. What’s the latest news?
-How about the pollution in the countryside? -Luckily, it’s not as serious as _______ in the big cities.
They had to operate _______his arm because it was broken in two places.
-It was _______ great fun to be a host, wasn’t? -Yes. That’s _______ experience hard to forget.