He has gone ______ such a lot since his wife died.

Since his wife passed away, he has become increasingly ___________________.

A、

irrelevant

irrational

irrespective

irregular

Since his wife died, he has ( ) himself into the research work.

A、devoted
B、dedicated
C、thrown
D、contributed

He lived ____________after his wife died.

A、

miserable living

a miserable life 

miserable life

He became even more ( ) (depress) after his wife died.