题目内容：

1.I have a few questions ( )the environment of the apartment.
填concern的变形.为什么填concerning而不是concerned
2.the ( )of blood pressure can cause headache anda heart trouble.
填raise 的变形.为什么填raising而不是raised
3.I ( ) his attitude towards his work although he made some mistakes.
填admire 的变形.为什么填admire而不是admired