____ Lily ______ Lucy may go with you because one of them must stay at home.

A．Not only ... but also

B．Both ... or

C．Both ... and

D．Either ... or

6～12岁的儿童检查可用（）。

A.内径3.5～4.0mm的支气管镜

B.内径4.0～4.5mm的支气管镜

C.内径5.0mm的支气管镜

D.内径5.0～7.0mm的支气管镜

E.内径7.0～9.0mm的支气管镜