2016 · Q38
I am waiting for three-quarters of an hour.
EnglishSentence Improvement
- AI am waiting since
- BI have waited since
- CI have been waiting for
- DNo improvement
Explanation
A waiting period of 'three-quarters of an hour' extending to the present calls for the present perfect continuous: 'I have been waiting for'. 'Since' (A, B) is for points in time, not durations, and the original simple present is wrong.