As a result of the Black Death, ______. A: all land was left untended B: no labor was required any longer C: Landowners tended to change from arable to sheep-farming D: surviving peasants were not able to bargain about their wages

As a result of the Black Death, ______. A: much land was left untended and there was a shortage of labour B: landowners tended to change from sheep-farming to arable-farming C: the government did not show much concern about the labour shortage D: the government took several measures to raise the peasants' wages

Which of the following was NOT done by the researchers in their study（） A: Interviewing wood mill operators and landowners about logging. B: Surveying fire damages from the airplane. C: Measuring the actual wood harvest in selected parts of forest. D: Surveying the damage of forest caused by Amazon floo