---Wow! Jerry got full marks again! How lucky he is!

--- _______. He is not so much lucky as hard-working. He makes full use of his time to study.

A．No wonder

B．Not exactly

C．Not possible

D．No doubt

（）是决定婴儿之间个性差异的主要原因。

A、教育的内容

B、父母受教育的程度

C、接受教育的时间和程度

D、家庭教育的目的