He tried to deal with the ever-increasingburden of his work，butfinally _____ and had to take a complete rest

If you don’t know what their shortcoming are, your chances of overcoming them are very ______.

________do you want to be a reporter — Because it’s an interesting job.

The first textbooks ______ for teaching English as aforeign language came out in the 16th century

The Changjiang River is one of ________ in the world.