The achievements of the greatest minds in science could never have been reached________ the patient work of hundreds of others.
The number of the people invited to the meeting ____ about 100, but a number of them ____ late because of the heavy snow.
The students asked ____.
You should thank Peter. It was he who finally ____ your son to stop smoking and playing computer games.
— Tom, Miss Lee asked you to go to her office as soon as you arrived.— ____ What did she say?
All the photographs in this book, _______ stated otherwise, date from the 1970s.