单项选择题
It is not easy to ______ oneself of his bad habits, just as the proverb says, "Old habits die hard".
单项选择题 Difficulties and hardships have ______ the best qualities of the young scientist.
单项选择题 Susan has ______ the elbows of her son’s jacket with leather patches to make it more durable.
单项选择题 The team played hard because the championship of the state was ______.
