10речень з прийменники будьласка

1.at 7:45 am I go to school2.I got on my bike and said goodbyeto my friends/3.I went to the river4.I walked past the school5. І was walking in the park6.I go to a dance on Saturday7.My friend is at school8.She called at the door9.I heard strange sounds at night10.I brush my teeth in the morning