Because of the bad weather, my mother ____ and lay in bed. She ______ for a week. 

 My study of biology has ______ much of my spare time, but it has given me a great deal of enjoyment. 

Years of fighting have ______ the area ______.

—Why did you come by bus?---My car broke down yesterday evening and I ____ it repaired.

—Does he know how to work out the problem? —Yes, he has _______ a good idea to solve it.