Last term our maths teacher set so difficult anexamination problem ______none of us worked out

lly, after I tell my brother what todo, he ____ go and do the opposite．

The supermarket offers __________ goods to choose from, so more and more people prefer to shop there. [ ]

When ____about what she thought of the movie, she just said it was worth seeing a second time.

Having retired from business,he nowhimself with the welfare of the disabled and lives a meaningful life. [ ]