Professor Smith, along with his assistants, _____on the project day and night to meet the deadline.
Are you ___ to make the best of time and catch up with your classmates?
I thought it would be rainly that day, but it ___ to be fine.
The fact ___ she was often late for school made her teacher angry.
The scientist said videophone could be used ___ the conferences.
A lot of cities, ___ Shanghai and Guangzhou , are getting more and more beautiful.