1. Whenever Ma had customers, she would call Zhang to deliver the drugs after fetching them from a secret place.
2. She collected and hid the teenager's diary after the Nazi secret police discovered their hiding place in an Amsterdam office building.
3. The best way to keep a secret is to ask them not to tell you in the first place.
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4. Some 62 percent keep their sexual orientation as a secret in the work place.
5. Her flight's time and place of arrival were kept completely secret until the last minute.
6. The man who led the construction of Mao Zedong's final resting place reveals his secret mission's details.