--- Where is your mother?

--- She has ______ to Sichuan on business. She has ______ there four times recently.

A．gone, gone

B．been, been

C．gone, been

D．been, gone

某地有A、B、C三家企业，分别处于盈利、亏损、享受优惠政策阶段。三家企业都欲在这几天购置一些固定资产，试从固定资产计价和折旧方面对企业进行节税筹划。