_______ 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。
Why couldn ’t you ________ an answer when I asked you why you were late?
Imagine how many times restaurants and merchants had to change their posted prices during the _____ 1970s, when prices almost doubled.
It _______ for two hours now
We _______ if you could give us whatever information you can in this respect.
I would love ________ to the party last night but I had to work extra hours to finish a report.
