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. 

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

Select appropriate preposition to fill in the blank:
 They walked ........... the footpath until they came to a bridge.

The opposite of the word ‘support’ is 

The wind _____ the candle.