中国大学MOOC: The Great Wall is unparalleled in the world in its scale and ______________, as well as for the great quantities of labor and the degree of difficulty involved .
举一反三
- The Great Wall is unparalleled in the world in its ______________, as well as for the great quantities of labor and _________________.
- 中国大学MOOC: Great Wall is listed as one of the world culture heritage sites in_________.
- The construction of the Great Wall involved 19 states.
- 中国大学MOOC: The great wall symbolizes that great achievement can be made with a a common will and __________ .
- The construction of the Great Wall took more than_________ and involved ________ .