We may infer that a change in class relationships after the close of the Middle Ages produced greater productivity because ______.
A: freemen had incentive to produce more
B: masters had greater incentive to work their workers harder
C: slaves never starved, no matter what they produced
D: productivity could go in only one direction
A: freemen had incentive to produce more
B: masters had greater incentive to work their workers harder
C: slaves never starved, no matter what they produced
D: productivity could go in only one direction
举一反三
- The watches that they______a year ago were poor in quality. A: will produced B: had been produced C: had produced D: produced
- The _________ you work, the greater progress you will make. A: more hard B: hardest C: hard D: harder
- Czerwinski found that no other change to a computer system could more significantly improve a user’s productivity than ______.
- (No matter what) (tiring) a day she (has had), she (never loses) her good humour. A: No matter what B: tiring C: has had D: never loses
- Dick had to work after class and during his holidays because （） A: his parents told him to make more friends B: he wanted to become a rich man C: he couldn’t go on with his studies without enough money D: he had nothing to do at home