,children always look forward _TO _festivals.
2,a young family is alway on__debt china today .
3,we met _on_accident at the railway station after 20 years
4,we must prevent the cancer _to_spreading in this area
5,some students hate a gift _in_music
6,don't lose heart when you come _over_difficulties
7,are you satired to _our products
8,he has become quite badly _down_since he lost his job
9,I alway feel _in_ease with him
10,switzerland is famous _for_its mountains