1. The lights in the observatory dome have been burning since dawn and all three vehicles are still parked outside, which can only mean that the team ---- still analysing the data from last night's session.

2. The seismic network has recorded unusual tremors beneath the caldera, and volcanologists warn that the mountain ---- at some point within the next decade, though nothing is certain yet.

3. Since the space telescope began operating in 2022, astronomers ---- observe galaxies that formed less than three hundred million years after the Big Bang.

4. Her coat was still hanging behind the door and her coffee cup had been left half full; since nothing else could account for the state of the office, the researcher ---- the building in a great hurry.

5. With her publication record and her fluency in three languages, Dr. Aydın ---- the international research grant without much difficulty, but she chose to remain in the private sector and never even applied.

6. Although the expedition had been pinned down by the blizzard for almost two days, the rescue helicopter ---- the base camp shortly before nightfall on Thursday.

7. The signal has been traced to a source roughly forty light years from the solar system, which means that whatever is producing it ---- a spacecraft built by human beings.

8. The fossil's teeth show no trace of wear and its limb bones are unusually slender, and since that combination occurs at no other stage of growth, the only possible conclusion is that the animal ---- a juvenile when it died.

9. The manuscript is written on a type of paper that was not manufactured anywhere in Europe before 1450, which means that the monk to whom it is traditionally attributed, and who died in 1391, ---- it.

10. The dispatches were being delivered to an abandoned consulate throughout that autumn, so the ambassador ---- what his government had decided; not a single one of the papers ever reached his desk.