— What your favourite toy?
— It's a doll.[ ]
A. am
B. are
C. is
答案：C
寒带果树能抗（）以下的低温。
A．-40℃
B．-30℃
C．-20℃
D．-10℃
It was announced that only when the fire was under control ___ to return to their homes.
A．the residents would be permitted
B．had the residents been permitted
C．would be residents be permitted
D．the residents had been permitted
