题目

 Mary’s pale face suggested that she _______ ill and her parents suggested she ________ a doctor.  A. should be; should see       B. was ; see    C. be; seeing         D. was; would see 答案：B先化简，再求值（1）求代数式的值：（a-2）（a+2）-2a（a-2）+（a+2）2，其中a=-1（2）已知2a-b=8，求[a2+b2-（a-b）2+2b（a-b）]÷4b的值．