以下の長文問題で何故（）1.2.3.4の英文が入るのか教えて欲しいです。 To: All employees From: Ethan Reid, Human Resources Director Date: July 1 Title: Performance Reviews The annual summer performance reviews are now (1. B. being scheduled) for the next three weeks. (2. C. Reviews are an important chance for employees.) It is best way to learn about areas that need improvement. Managers are expected to finish filling out their subordinates' evaluation sheets and (3. C. submit) them by Monday, July 28. Please note that every manager will (4. C. meet) the director of the department they belong to for their annual review between July 30 and August 4.