Johnson was ________ unknown before running for the presidency.
A、visiblyD
A显然，明显地B外表上，直观地C垂直地，直立地D实际上，事实上
Johnsonwas________unknownbeforerunningforthepresidency.
The volunteers would rather go by train than ________.
We ________ go out to restaurants, but mostly we eat at home.
ModernEnglishwordsman,woman,child,eat,fight,etc,originatefrom______.
Thisisanimportantproblem_______toofewsocialscientistshaveresearched.
