Fill in the missing prepositions

VI. Fill in the missing prepositions.
1. Keep those medicines ................. .................. the children’s reach.
2. Did you succeed .....................solving the problem?
3. Did she send you a postcard ....................your birthday?
4. They emigrated .....................Canada .....................America to find work.
5. He’ll come .....................to pick you ..................
6. Snow is falling all ......................the country.
7. The secretary took a message .....................her boss.
8. Will you pick me .................... ..................the party?
9. She is talking .....................her boyfriend ...................the phone.
10. My mother often goes to work ....................foot.