I don’t know _________.
A: why do this
B: why having done this
C: why doing this
D: why we ought to do this
A: why do this
B: why having done this
C: why doing this
D: why we ought to do this
举一反三
- I don’t understand ______ believe me. A: why you not B: B. why do you not C: C. why don’t you D: D. why you don’t
- Why do I have to break the news to him? I don't feel like it. A: do B: does C: did D: doing
- I don't know _____ A: why you always play games B: which is the way to the station C: why do you always play games D: what is the way to the station
- Why don’t men do _______ housework?
- They don’t do those things because they don’t know ______. A: what B: how C: why D: when