Is ________ true that the famous scientist will give us a lecture next week?

1. A.
   that
2. B.
   it
3. C.
   his
4. D.
   he

Is ______ true that the famous scientist will give us a lecture on how to predict earthquakes next week?

Is ______ true that the famous scientist will give us a lecture on how to predict earthquakes next week?

1. A.
   that
2. B.
   it
3. C.
   this
4. D.
   he

Is ______ true that the famous scientist will give us a lecture on how to predict earthquakes next week?