Mark Twain was restless when he was young and moved a lot, first eastward as a journeyman printer, up and down the Mississippi as （ ）.
A.a steamboat pilot B.a guard C.a servant D.a sailor正确答案A
Mark Twain was restless when he was young and moved a lot, first eastward as a journeyman printer, up and down the Mississippi as （ ）.
A.a steamboat pilot B.a guard C.a servant D.a sailor正确答案A
