–Granny, you look so weak. What’s wrong with you? –Terrible. The factory made _____ noise. It was _____ noisy that I couldn’t sleep well last night.
Pollution is a serious problem. Scientists have _____ some good ways to save it.
We can’t put off _____ a plan .
I saw himwhen I passed by.
Some people plan to ______ a volunteer project to help the disabled children.
You should look after, classmates.