—The light___________on for long. —Oh, I am sorry , I will go and turn it off.
#101529
A
has been left
B
has left
C
had been left
D
had left
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Prices____ all the time and no one knows when they         stable.
#101890
A
are going up; become
B
have been going up; will become
C
have gone up; will become
D
have been gone up; become
Quantities of water ________for cooling in the only one of the factories that ________steel.
#102723
A
has been needed;produces
B
have been needed;produce
C
is needed;produce
D
are needed;produces