Grammar Quiz
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___ sensors in the building detected motion during the night.

A. ∅

B. the

C. a

D. A

Select your answer:
A  B  C  D  E 


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Some insects are able to blend in with their ____________ so that they won’t be caught easily.　

A. consumers

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C. substances

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Fill in the blank with the correct past participle form: We’ve already ___ (say) goodbye to everyone.

A. saw

B. said

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Roses are the most common flowers given ___ this occasion.
a. on
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c. after
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The cell ____ rapidly under the microscope at 9 AM this morning.

A. was dividing

B. divides

C. is dividing

D. will divide

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