我遇到这些错误，不知道如何解决

• 错误（25,1）：PLS-00103：遇到符号“ EXEC”
• 错误（30,1）：PLS-00103：预期以下情况之一时遇到符号“ SELECT”：begin函数pragma过程子类型类型当前游标已删除之前存在符号“ begin”被替换为“ SELECT”以继续。
• 错误（30,22）：PLS-00103：预期以下情况之一时遇到符号“文件结束”：继续关闭当前删除获取锁定插入打开回滚保存点设置sql执行提交forall合并管道清除

DROP TABLE学生；犯罪;

 CREATE TABLE Student(
    studentNumber INT NOT NULL,
    studentName VARCHAR2(20) NOT NUll,
    gender CHAR(1) NOT NULL,
    highSchoolAvg INT NOT NULL,
    scholarship INT DEFAULT 0,
    CONSTRAINT "student_gender" CHECK (gender IN ('M', 'F')),
    CONSTRAINT "student_highSchoolAvg" CHECK (highSchoolAvg BETWEEN 0 AND       100)
);

CREATE OR REPLACE PROCEDURE AcceptStudent(
    studentNumberPR INT,
    studentNamePR VARCHAR2,
    genderPR CHAR,  
    highSchoolAvgPR INT)
IS
    ScholarshipPr INT;
BEGIN
    ScholarshipPR := 0;

    IF highSchoolAvgPR >= 90 and highSchoolAvgPR <=100 THEN
        ScholarshipPR := 1500;

    ELSIF highSchoolAvgPR >= 85 and highSchoolAvgPR < 90 THEN
        ScholarshipPR := 1000;

    ELSE
       raise_application_error(-20201, 'Invalid highSchool average');
    END IF;

    INSERT INTO Student (studentNumber, studentName, gender,     highSchoolAvg, scholarship) 
        VALUES (studentNumberPR, studentNamePR, genderPR,     highSchoolAvgPR, ScholarshipPr);
END;

exec ACCEPTSTUDENT (1, 'Ashley', 'F', 87);
exec ACCEPTSTUDENT (2, 'Will', 'M', 76);
exec ACCEPTSTUDENT (3, 'David', 'M', 94);
--Holly should be the only error--
exec ACCEPTSTUDENT (4, 'Holly', 'F', 103);
select * from student;