单词拼写（共10小题，每题1分，满分10分）
C___________ on your success last night!
He b________ down and came up with a $20 bill. “ Sir, you must have dropped this.” The waiter said.
Every year thousands of college g_____________ crowded in the job fair, hoping to find their desirable jobs.
I’m very c_________ about my son in his new school, for he never knows how to take care of himself.
He could have finished it on s__________, but somehow he fell behind.
In the past, the villagers t__________ their goods by goat not by truck.
They built s_________ for the homeless children.
Though I haven’t met him for many years, I could r__________ him immediately when I saw him.
He was c_______ along the street when he was knocked off his bike.
Some animals hibernate (冬眠) under snow, because there is much air in l_____ snow.