_____ my surprise, he ate all the food.

Both teachers and students _____not to use mobile phones in class in our school.

The problem ___ we should put off the sports meet ___ at the meeting yesterday.

What are they talking _______ the teacher _______ —The coming sports meeting.

I have worked hard at English, but it seems that I haven’t made any progress.—Keep on _____ at it, and you will be successful.