A fire broke out in the neighborhood last night. By the time the firemen arrived, it    . 
#101011
A
had been put out
B
would put out
C
has been put out
D
was putting out
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Before us lies the biggest room, _____ with things like guns, dolls and old clothes.
#101699
A
filling
B
filled
C
being filled
D
having been filled
He has promised me that upon my return he       for me at the airport.
#102305
A
is waiting
B
will be waiting[
C
will have waited
D
waits
They ______ on the program for almost one week before I joined them, and now we _____on it as no good results have come out so far.
#104931
A
had been working; are still working
B
had worked; were still working
C
have been working; have worked
D
have worked; are still working