我下学期选了心理学和音乐鉴赏这两门选修课。

I've selected psychology and music appreciation as my ___electives for next semester.

医生建议将这项手术安排在下个月，因为它不是紧急手术而是择期手术。

The doctor suggested scheduling the procedure next month as it's an ___elective rather than an emergency surgery.