题目

On a sunny day last August, Tim heard some shouting. Looking out to the sea carefully, he saw a couple of kids in a rowboat were being pulled out to sea. Two 2-year-old boys, Christian and Jack, rowed out a boat to search for a football. Once they’d rowed beyond the calm waters, a bleach umbrella tied to the boat caught the wind and pulled the boat into open water. The pair panicked and tried to row back to shore. But they were no match for it and the boat was out of control. Tim knew it would soon be swallowed by the waves. “Everything went quiet in my head,” Tim recalls(回忆下列哪项不是种子萌发所必需的（　　） A、充足的阳光B、充足的氧气C、适宜的湿度D、一定的水分