间变性室管膜瘤在WHO分级中属于（）

A:WHOⅠ级 B:WHOⅡ级 C:WHOⅢ级 D:WHOⅣ级 E:未纳入WHO分级

______that called this morning

A:Who was B:Who it was C:Who was him D:Who was it

—Someone is knocking at the door, dad! —Go and see ________.

A: who is it B: who it is C: who was it D: who it was

—Someone is knocking at the door, dad! —Go and see ________.

A: who is it B: who it is C: who was it D: who it was

—Someone is knocking at the door, dad! —Go and see ________.

A: who is it B: who it is C: who was it D: who it was

____ broken the window?

A:Who has B: Has who C: Who D: Had who

-- _________ you called yesterday?-- Tom.Why?

A:Who it is that B:Who is it that C:Who was it that D:Who it was that