阅读短文, 从每题A、B、C、D四个选项中, 选出一个能填入文章中相应空白处的最佳答案。"Let's go home," Liam said to his little sister, Flora, after their art class one Saturday morning. We' re late for 1 ."
The night before, it had snowed hard. They had difficulty walking to their cozy home on Adelaide Street, passing through an empty building site. Suddenly, Liam heard a loud thud(砰的一声). He 2 only to see that Flora was gone. His sister had fallen into a deep hole. "Help!" she cried.
Liam looked around, but no one was in sight.
"Climb up the sides!" Liam 3 . His sister tried climbing up the hole, but failed. Then, he saw a huge tree nearby. He found the 4 tree branch and broke it off. He showed it to Flora."Get hold of the tree branch!" Liam pleaded.
She 5 the branch, but it wasn't close enough, "I can't reach it!" she responded.
Liam saw a store in the distance and decided to get 6 . It was far, so he needed7 to mark(标记) his way.
He went through his backpack and 8 some paint cans from his art class. I could use those paints to mark my way, Liam thought.
Liam walked difficultly to the store with many red marks behind him. He looked 9 the window. The lights were off, and there was nothing on all the shelves. A Closed sign was on the door. Feeling upset, he walked back to Flora 10 .
Suddenly, he had a wonderful 11 . He used his scarf, jacket, and hat to make a long rope(绳子). Liam 12 the rope into the hole and leaned down(俯下身), so Flora could catch it.
Liam leaned down 13 Flora caught the rope. He then 14 pulled her up. Liam smiled.
They hugged and after walking for what felt like forever, their cozy red 15 was finally in sight..