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
网友回答
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
(答案→)D. how we can improve the English level within 4 months
解析：考查同位语从句。A，B多了连词，所以排除；且从句要用陈述语气，所以选D。