PART 1 Directions: A word or phrase is missing in each of the sentences below. Four answer choices are given below each sentence. Select the best answer to complete the sentence. Then mark the letter (A), (B), (C), or (D) on your answer sheet. 1. Our office security door is scheduled to . this week so all staff members are required to return their security cards to the front desk. replace replaced being replaced be replaced 2. The post office will be closed at on Thursday holiday weekend. since due to while as if 3. As we were running.