We are taught that a business letter should be written in a formal style _____ in a personal one.
The __________ is just around the corner and you won't miss it.
__________ she couldn't understand was__________ fewer and fewer students showed interest in her lessons.
Scientists say it may be five or ten years___________ it is possible to test this medicine on human patients.
The girl__________ on the ground __________to me that she had___________ the book on the shelf.
--Did Mary come to your birthday party? --No. I __________ her, but she was away on business.