This is the second time she ____ improvement on that equipment.（ ）
- A.had made
- B.made
- C.is making
- D.has made
正确答案及解析
正确答案
D
解析
本题考察it is the＋次数＋（that）＋sb. have done sth.的用法。
This is the second time she ____ improvement on that equipment.（ ）
本题考察it is the＋次数＋（that）＋sb. have done sth.的用法。
