When it comes to giving his kids the education they deserve, the 51-year-old father knows he never _______ college without financial aid.

A．could have attended

B．could attend

C．had attended

D．should have attended

一千瓦的电动机换算马力为（）

A、1.28马力

B、2马力

C、1.34马力

D、1.36马力