Dr. Frank failed many times but he finally _____ to find a successful way to solve the problem.
I can ______ some noise while I’m studying, but I can’t stand very loud noise.
John has put on so much weight recently that his mother has to ______ all his trousers to his measure.
The government has _______ the parents to work with teachers in the education of their children.
The plan ______ just because people were unwilling to co-operate.
My study of biology has ______ much of my spare time, but it has given me a great deal of enjoyment.