Ⅰ.单词拼写
1．The driver of the car accident received serious ________(伤害) to the legs.
答案：injuries
2．Do keep the ________(毒药) away from your children.
答案：poison
3．A cold，fever and headache are the usual ________(症状) of flu.
答案：symptoms
4．Speed is ________(至关重要的) to the success of our plan.
答案：vital
