1 feel that one of my main duties ______ a teacher is to help the students to become better learners. 
#4903
A
for
B
by
C
as
D
with
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  _____ , you need to give all you have and try your best. 
#4941
A
Being a winner
B
To buy a winner
C
Be a winner
D
Having been a winner
I regreted_________him the news that our team had failed.
#4999
A
to tell
B
telling
C
having told
D
to have told
How are you getting on with your classates?——______. I’ve got to know them all.
#4918
A
Far better
B
Much pleased
C
Very comfortable
D
Very good
Although ______ for many years, the two old sisters recognized each other at once.
#5021
A
having been separated
B
being separated
C
having separated
D
had been separated