The children are busy doing piles of homework, for they _______ their end-of-term exam soon.
#101289
A
will be taken
B
take
C
are taking
D
would take
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Unfortunately, when I dropped in, Professor Smith ________, so we only had time for a few words. 
#104738
A
has just left
B
had just left
C
just left
D
was just leaving
Large quantities of oil      in a place near my hometown recently. 
#102718
A
has discovered
B
have discovered
C
has been discovered
D
have been discovered
In the past,ice ______food.
#104372
A
used to keep
B
used to be used for keeping
C
was used to keeping
D
used to be used to keeping
—Have you moved into your new classroom building? —Not yet, it ______________.
#99299
A
was painted
B
is painted
C
has been painted
D
is being painted