The little kid _____ not touch the dog.
Imagine what today’s life would be like if Alexander Bell _____ the telephone more than 130 years ago!
A study has proven old people who are ______eaters of fish during their youth lose fewer brain cells.
Miss Li ___ as a secretary for five years in the company, and now she is general manager of it.
We’ll have to race the clock to complete the work on time.
So much progress _____ in the past few months that she now has no difficulty in making herself understood in English.