A large number of human beings visit zoo and _________it difficult to maintain them.

Improve the sentence: Neither he nor I were there. 

Fill in the blank with the correct preposition:
 She sat here _______ 8 O'clock.

Now he _____  his father's business. 

Select the most appropriate option to complete the given sentence.
One must learn to __________ a line between one’s private and professional life.

Choose the correct meaning of the following Technical / Official terms from the options given below: 

Assets / परिसम्पत्ति 

We could barely get any information at the airport _____ people seemed to have _____ idea about the flights.

The wind _____ the candle.