I need to _________ with some ways of getting money or I’ll have to stop.

Listen! Helen is singing in the classroom.—It _______ be Helen. She has gone to Shanghai.

39_______ is certain, people’s living conditions in China have improved a lot since the 1980s

Conference callingfor living a low-carbon life to cope with global warming

Though Shakespeare has long gone, his powerful ideas still undoubtedly ________ the western society.