—______ of them knows Japanese, so I have to ask a third person for help.

―You’d better ask Tom for help. He is good at Japanese.

A．Neither

B．All

C．Both

D．None

下面做法对婴儿安全不利的是（）。

A、购买家具时应避免尖角和锐边、缺口、本刺等

B、有尖角的家具应套上塑料防护角

C、要购买安装了防脱落装置的抽屉

D、购买家具时只需要注意家具的款式