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___ sensors in the building detected motion during the night.
A. ∅
B. the
C. a
D. A
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ApologizingPast Tense and Past ContinuousRelative Pronouns and AdverbsPresent Perfect Simple and ContinuousGrammar ElementarySentences Function and StructureMay, MightPassive SentencesPast and Perfect TensesPassive to ActiveOther quiz:
Grammar › ViewA: Have Mr. and Mrs. Coles left for Madrid?
B: Yes, _____________.
A. they did
B. they have
C. they haven’t
Places in Town › View
There is _______ old house next to the hospital
A. two
B. a
C. an
Grammar › ViewRoses are the most common flowers given ___ this occasion.
a. on
b. in
c. after
d. under
Tenses › View
The cell ____ rapidly under the microscope at 9 AM this morning.
A. was dividing
B. divides
C. is dividing
D. will divide