The children in the orphanage requested they ______on a tour across the city.
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A
take
B
took
C
be taken
D
were taken
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— You ought to have called her yesterday .    — Yes , I know I ____ . 
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A
ought to
B
ought go have
C
ought have done
D
ought to have called
-You must call them every week. -Yes, I _____.
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A
must
B
should
C
have to
D
will
The safety belt saved the boy; otherwise, he _____ in the accident.
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A
would be killed
B
was killed
C
had been killed
D
would have been killed