prepositions

Fill in the blank with appropriate prepositions.

Mark is looking(1)___his sister at home.His mother is very busy(2)___work so she cannot come back home(3)___the moment.Suddenly the lights go out.Both of them are afraid(4)___the dark so they do not know what to do.They feel(5)___ crying.Fortunately their father arrives(6)___the house at this time.Their mother is worrying(7)___them so she has asked their father to come home earlier.That night their father cooks a big meal(8)___them.