Insert prepositions in the following sentences:
1. I am no good ________ French.
2. It is very difficult ________ foreigners to understand Cockney.
3. As soon as he entered the room he started talking _______ her _______ his travels _______ India.
4. I have never yet known her to be ________ time _________ appointments.
5. The surgeon who had operated _________ the prince was presented _________ a gold watch.
6. John is very different ________ his brother. I prefer Mary ________ both of them.
7. I was surprised __________ the result of the match. I had counted ________ a victory.