The old couple have been married for 40 years and never once ___________ with each other.

33. — How can you be late for such an important conference? — Sorry! But my flight was ______ by fog.

_______ your answers with those at the backof the book to see if they are right

He took the machine to pieces to find out how it .

In class 10 there are 60 students, and more than half_____ wear glasses.