Mei Li:
Chalcopyrite is a major ore of which metal??
Shuai Zheng:
copper
Mei Li:
What sugar substitute, also known as glucitol, is named after the sorb fruit of the sorbus tree??
Shuai Zheng:
sorbitol
Mei Li:
Which character was played by Jim Carrey in 'Batman Forever'??
Shuai Zheng:
riddler