根据句意及汉语提示，补全单词。

1.  The boy got        (撞击) in the head with a basketball bat.

2.  I had an allergy        (袭击) last week.

3.  I had problems seeing the blackboard.  Maybe I am        (近视).

4.  She burnt herself while cooking in the        (厨房).

5. There was something        (严重的) with his right arm.