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To change it into active voice, the subject (the manager) should perform the action directly:"The manager did not sign the documents."
Options 1 and 2 are grammatically incorrect, and option 3 changes the meaning entirely.
Oxygen is transported in the insect body mainly through which of the following systems?
In the law of constant returns, the shape of the production curve depicting output relative to input is:
ICAR – Central Institute of Agriculture Engineering is located at
Under conservation tillage soil aggregates stability (%) increases because of
Kalyanpur Baramasi is cultivar of:
Transfer of Ownership is an example of which utility
Which one the following Country has largest area under drip irrigation in the world?
Flag smut of wheat is caused by:
Which among the following crops is considered a typical C4 plant, exhibiting high photosynthetic efficiency under high temperature and light intensity c...
The universal pollinizer or donor variety of sweet cherry is identified as: