The old man never fails to help___ is in need of his help.
Robert is said _____ abroad, but I don’t know what country he studied in .
How much shall I pay for the telephone call? —You _____. It’s free.
How did the Chinese doctors get to Haiti (海地) to help the people there? — They got there ______ plane. [ ]
When Tom ______ Beijing, it is raining.