To be happy-go-lucky is to be cheerful about almost everything and forget about the stresses and pressures of everyday life.

A. Because gold was found in Alaska.
B. Because Alaska has an abundance of seafood.
C. Because Alaska proved rich in oil and minerals.
D. Because Alaska is bordered by Yukon.

A. 2,250 RMB．
B. 18,900 RMB．
C. 189,000 RMB．
D. 225,000 RMB．