回复 7# 的帖子
Any foreign language,whether it be English or French,normally takes a couple of years to be mastered.
B错了,应该该成is, 从句是一个完整的句子,应该有时态的变化。
Scientists are having a hard time fingding out more about the extent which parents influence their child.
C错了,应该该成to which, (parents influence their child to which extent)