____ sat down for a rest       the door bell rang.
#83959
A
Hardly I had; when
B
Hardly I had; than
C
Hardly had I; than
D
Hardly had I, when
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Not for a moment ______ that this disease was caused by certain virus.
#81548
A
he have doubted
B
he doubts
C
did he doubt
D
he did doubt
—Flora has made much progress these days.—        , and ___________.
#79606
A
So has she; so you have
B
So she has; so have you
C
So has she; so have you
D
So she has; so you have
Not only_______polluted but________crowded.
#82874
A
was the city,were the streets
B
the city was,were the streets
C
was the city,the streets were
D
the city was,the streets were