Waste paper, waste glass, and waste iron can all be _____.
According to the Tourism Law of the People’s Republic of China, tourists _____ observe public order and respect local customs, cultural traditions and religious beliefs.
–I didn’t attend the lecture yesterday. - I ______, either, if my mother hadn’t reminded me.
Smith is poor. He has to manage on _________ $ 10 per week.
The new supermarket was once close to closing down. But since the underground was opened, business has been _______.
– Where did you find the wallet I lost yesterday? -- It was on the playground ______ we played basketball.