22.______ in natural gas and oil, so thi
题型:选择题
问题:
22.______ in natural gas and oil, so this area is worth developing.
A.Being rich
B.It is rich
C.It being rich
D.To be rich
22.______ in natural gas and oil, so this area is worth developing.
A.Being rich
B.It is rich
C.It being rich
D.To be rich