The following statements about Francis Drake are true:
- sailed through the Strait of Magellan: True. He navigated through the Strait of Magellan during his circumnavigation of the globe.
- was a sea dog: True. Drake was considered a sea dog, which refers to a term for English pirates or privateers who operated against Spanish ships and interests.
- was called the "Master Sailor": This statement is not widely recognized as a common title for Drake, so it may not be true.
- robbed Spanish gold: True. Drake is known for his privateering activities against Spanish ships, in which he seized treasure and gold.
So, the true statements about Francis Drake are that he sailed through the Strait of Magellan, he was a sea dog, and he robbed Spanish gold.