51______A. developedB. discoveredC. tookD. fostered
51______
A. developed
B. discovered
C. took
D. fostered
相关考题:
The political situation in the region has deteriorated rapidly.A: improvedB: changedC: worsenedD:developed
Many forms of cancer can be cured if detected early.A:discoveredB:selectedC:operatedD:developed
One-room schoolhouse can still be found in isolated areas of North America.A:bareB:deprivedC:remoteD:developed