_ has made the mistakes is not clear.
问题描述:
_ has made the mistakes is not clear.
A.why
B.that
C.who
D.how
答
A.why原因why引导的从句作主语他犯这种错误的原因还不清楚。
_ has made the mistakes is not clear.
A.why
B.that
C.who
D.how
A.why原因why引导的从句作主语他犯这种错误的原因还不清楚。