Although they feel tired,__________they still go on working. 
#56350
A
and
B
but
C
/
D
so
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______I know him, ______I hardly talk to him.
#58081
A
Although; but
B
Although; /
C
/; Although
D
But; although
I decided to write rather than________.
#57562
A
telephoning
B
telephoned
C
telephone
D
telephones