单选题 The deadly plague of 1348-1349, commonly called the black death , added to the horrors of the Hundred Years" War. It originated in Italy and soon spread to France, Germany and England. Those who were stricken with it usually died in two or three days. A careful estimate shows that in England one half of the population died of this disease.
Up to this time the majority of those who cultivated the land in England had been serfs (农奴) and tenant-peasants. The tenants belonged to some particular manor, paid stated dues to and performed definite services for their lords. The serfs lived an even worse life. They had to work on the nobles" lands for more than half of the year. They had to pay countless dues. They had to give a certain portion of anything they got to their lords. The feudal nobles" extravagant life was based on the hard labour and suffering of the tenants and serfs.
The effect of the black death soon made itself felt. Unattached labourers began to demand higher wages. When not satisfied, they repeatedly deserted one employer after another until their demand was fulfilled. The serfs also demanded reform and improvement of their conditions. To seek a better chance or life, serfs began to run away from their masters in increasing numbers, for they could easily get employment once they had got away. Labour was needed everywhere.

单选题 What does "the black death" in Paragraph 1 refer to in this passage?______

单选题 Where did the black death begin?______

单选题 We can infer from this passage that ______.

单选题 Which of the following is NOT TRUE according to the passage?______

单选题 Why did laborers begin to demand higher wages?______