![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
Have you any idea _______?
A.
that how we can improve the English level within 4 months
B.
that how can we improve the English level within 4 months
C.
how can we improve the English level within 4 months
D.
how we can improve the English level within 4 months