___________two tickets for the new play at the Grand Theatre on Saturday. Shall we go and see it together?

A．They have been given

B．I have been given

C．I am given

D．They have given to me

有关肺活量的概念，下述哪项正确（）

A.平静呼气末肺内的气体量

B.最大呼气后肺内的余气量

C.一次呼吸吸入或者呼出的气量

D.在1分钟内能呼出的气量

E.在最大的吸气后能够排出的气量