Never should we forget the war and sufferings _________ caused to the people.
It was dark in the cave so she ______ a match.
. ______ me most was that the young boy who had lost both arms in an accident could handle a pen with his feet.
It is quite common for a working man to make ______ for his old age by putting aside enough money to live on.
Classification is a useful ______ to the organization of knowledge in any field.
He was ______ determined than you, but he turned out to be the first to back out.