When he picked up a large sum of money by accident, he battled with his _____ whether he should keep it or return it to the owner.
#13191
A
consciousness
B
conscience
C
commitment
D
convenience
推荐题目
I first met Lily five years ago. She ___ as a nurse in a hospital at the time. 
#11692
A
was working
B
has worked
C
had been working
D
had worked
I catch cold now and then.
#13656
A
always
B
occasionally
C
constantly
D
regularly
The problem is not _____ easy. Think _____ over.
#14557
A
such, it
B
that, it
C
so,不填
D
that,不填