请教:2009年6月大学英语三级考试A级真题第2大题第1小题如何解答?
【题目描述】
Directions: This part is to test your ability to construct grammatically correct sentences. It consists of 2 sections.
Section A
Directions: In this section, there are 10 incomplete sentences. You are required to complete each one by deciding on the most appropriate word or words from the 4 choices marked A), B), C) and D). Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.
16. By the end of this year Mr. Smith ________in our company for exactly three years.
A) is working
B) has worked
C) will work
D) will have worked
【我提交的答案】: B |
【参考答案与解析】: 正确答案:D |
【我的疑问】(如下,请求专家帮助解答)
我想问下有关时态的表示?