Question

Use prepositions
1 . The children seem to be fond ........rides.

2. No boy is waiting .......the girl.

Answer 1

The children seem to be fond of rides
No boy is waiting for the girl 

Answer 2

1. The children seem to be fond of rides. The adjective 'fond', is usually followed by the preposition 'of'.

2. The boy is waiting for the girl. The verb 'wait' in this sense is usually followed by the preposition 'for'.