Where's my pen? [ ]
A. It's in the desk.
B. It's under the desk.
C. It's on the desk.
答案:B
While reading an interesting story book in my room,______________.
A.the light suddenly went out
B.the doorbell rang
C.someone was shouting outside
D.I heard someone shouting outside
齿突位于
A.寰椎
B.枢椎
C.隆椎
D.胸椎
E.骶骨