You didn't let me drive. If we ______ in turn, you ______ so tired. [ ]

A. drove; didn't get

B. drove; wouldn't get

C. were driving; wouldn't get

D. had driven; wouldn't have got

已知某文法G[S]：S->0S0 S->1，J从3推导出的符号串可用(25)(n>=0)描述。

A．(010)^n

B．0^n(10)^n

C．1^n

D．01^n0