When you arrive in Nanjing, tell me the address of the company _ you’ll work and l’11 drop you a line.
No one knows for certain how the first Americans arrived in _____ is now the United States.
A journal is not necessarily a reliable record of facts, for the writer’s impressions _____ colour the telling of events.
She seated herself at a small table in the restaurant, waiting _____.
Most online classes let students learn _____ their own pace.
_____the size of the universe, some researchers believe that there is life beyond our planet.