题干
______ is the biggest of the first four planets.
A：The 1st planet
B：The 2nd planet
C：The Earth
D：The 4th planet
答案(点此获取答案解析）
C
______ is the biggest of the first four planets.
A：The 1st planet
B：The 2nd planet
C：The Earth
D：The 4th planet
( )