Question

Young Lee learned some English when she stayed in America, and last year she ____ herself Japanese.

A．kept on teaching	B．went on teaching
C．kept on to teach	D．went on to teach

Answer 1

D

 Go on to do sth. 继续做另外一件事；go on doing sth.="go" on with sth.继续做某事（接着原来的做）。