— Susan, would you like to go hiking with us this afternoon?— I'd love to, but I study for a test.A. may B. have to C. can
-Could you please help me check what’s wrong?-Sorry, I don’t have much _______of the computer.
-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.