School was over. Usually David's mother would take him home from school but today she was not here. David decided to go home alone{#blank#}1{#/blank#} foot, and it took him about half{#blank#}2{#/blank#}(a)hour.

    When he got home, he couldn't get in{#blank#}3{#/blank#}he did not bring his keys. He knocked on the door, but no one answered. David thought his mother {#blank#}4{#/blank#}(be)in the toilet, so he waited patiently for her. After a few {#blank#}5{#/blank#}(minute), David knocked again, but still no one answered." What is happening？Is there anything wrong with my mother？"he thought to {#blank#}6{#/blank#}(he)and got worried. Just at that moment, he heard the {#blank#}7{#/blank#}s(friend)voice of his neighbour, John. David told him that no one was home, and John asked him {#blank#}8{#/blank#}(stay)in his house. Two hours later, when David's mother got back, he {#blank#}9{#/blank#}(play)games with John.{#blank#}10{#/blank#}happy he was to see his mother！