_________ he was honest, he was punished.

(a)

though

(b)

but

Walk carefully _________ you will fall down.

(a)

unless

(b)

otherwise

My mother called me _________ I was playing football.

(a)

or

(b)

while

My salary is low _________ I find the work interesting

(a)

nevertheless

(b)

similarly

The passengers rushed to board the bus _________ it arrived

(a)

as soon as

(b)

as long as