3. ……… Information about asteroids that are the biggest danger to Earth

4. ……… Information about the numbers of unidentified asteroids near Earth

The future in the past is used to refer to something that was the future at some time in the past. It does not matter if the future event happened or not as it was thought to be the future at the time.

I saw he had a gun, but I didn't think he_____.

I knew you ____the exam. You didn't make any effort!

He asked whether I______ him, but there was nothing I could do.

She promised she_____ an end to the situation, but failed to do so.

I lost my passport the day before we____ for our honeymoon.

I had a feeling that the party ______ a disaster. 

He  ____ to Iraq, but he came down with an infection before the trip.

The baby ______ be born in March, but it was finally born in April.