问题
单项选择题
The earth, ()is the fifth largest planet in the solar system, is the third planet from the sun.
A. who
B. whom
C. which
D. that
答案
参考答案:C
The earth, ()is the fifth largest planet in the solar system, is the third planet from the sun.
A. who
B. whom
C. which
D. that
参考答案:C