_______ that the scientist will give us a talk next month?
A、IstrueB
it在句中作形式主语，that引导的从句是真正的主语。本句运用的是疑问句式。
It is obvious how bad movies will impact ________ children.
Those who knew her ladyship are ________ that she was a person quite capable of performing this feat, had she not wisely kept out of the way.
The long prison galleries were full of life and ________ grave bustle.
Why couldn ’t you ________ an answer when I asked you why you were late?
As to the various pollutions,which of the following is NOT true?
