In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

The camel and the fox were very good friends and very good thieves. One day, the two friends (1) ______ to cross the river so that they could travel to a (2) ______ farm to steal food. The small fox (3) ______ swim, so the camel said to his friend, ‘Climb (4) ______ onto my back and I will swim across the (5) ______.’

Select the most appropriate option to fill in blank number 1.