Hearing the bell ringing，out ________.
#79664
A
rushing the children
B
were rushing the children
C
rushed the children
D
the children rushed
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Only when he returned______ the truth.
#81881
A
he found out
B
did he find out
C
he finds out
D
does he find out
Scarcely _____ raining _____ the PLA fighters started on their way again.
#83386
A
it had stopped...before
B
it had stopped...then
C
had it stopped...than
D
had it stopped...when
There are some health problems that, when ______ in time, can become bigger ones later on.
#79547
A
not treated
B
not being treated
C
not to be treated
D
not have been treated
, the disease will produce a powder poison that will kill the patient.
#79866
A
If it untreated
B
If is untreated
C
If being untreated
D
If untreated
Not until about 2000 BC________________________done.
#84454
A
were known of the oldest paintings
B
the oldest of known paintings were
C
the oldest known were painting
D
were the oldest known paintings