The manager_____ the workers how to improve the program since 9 a.m.
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A
has told
B
is telling
C
has been telling
D
will have told
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The fire was finally brought under control, but extensive damage _________. 
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A
is caused
B
was causing
C
had caused
D
had been caused
---When ______ again?  ---When he ______, I’ll let you know.
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A
he comes; comes
B
will he come; will come
C
he comes; will come
D
will he come; comes