Eggs are sold by ________ dozen while the meat is charged by ________ weight.
Mary has recently got engaged ________ a foreign teacher, who has been engaged ________ education research for years.
Time ________ quickly. Three years passed before we knew it.
Mr. Smith is busy these days ________ a new book on how to develop a child’s reading skill.
It makes no ________ to me what she says. I won’t care.
Who do you think is the right person to ________ the task?