he is too tired,but he still carries on ( )his work

问题描述:

he is too tired,but he still carries on ( )his work
A.toB.with C.at D.in
He couldn't go to the park ( )his bad leg
A.because B.because of

he is too tired,but he still carries on ( to)his work
He couldn't go to the park ( because of )his bad leg