On Sundays ,the retired(退休的）minster_____ come to the farm and work with the farmers.

------She looks very happy. She ______ have passed the exam. ------I guess so. It’s not difficult after all.

I ___________ through that bitter period without your generous help.

Helen ____ go on the trip with us, but she isn’t quite sure yet.

 -- Is it your brother playing football outside? -- It ________ be him. He is helping mother with dishes now.