Ⅰ.单句填空
1．Listening (listen) to loud music at rock concerts has caused hearing loss in some teenagers.
2．It's no use crying (cry) over spilt milk.
3．It's no good sleeping (sleep) in bed all day.
4．Reading in the sun is (be) bad for your eyes.
5．Smoking does (do) harm to the health.
6．It is a waste of time playing video games every day.
7．Consulting (consult) this kind of dictionary is really a piece of cake.
8．Living a lowcarbon life is (be) a good way to reduce the emission of greenhouse gases.
