东北师范大学远程与继续教育学院大学英语(一) 高起专 期末作业考核满分:40分一、Vocabulary and Structure (25 分)Section A Directions: In this section there are 15 incomplete sentences. For each sentence there are four choices marked A, B, C and D. Choose the ONE that best completes the sentence, Then mark the corresponding letter on the Answer Sheet with a single line through the center.1. Among the decisions that most people make, _A_ a house is perhaps the biggest one. A. purchasing B. purchase