卵子自卵巢排出后未受精,黄体开始萎缩是在排卵后的
A.4~5天B.9~10天C.11~12天D.13~14天E.15~16天
参考答案:B
The famous star got injured before her concert, made her fans worried.
A.who
B.which
C.that
D.what
I was writing in my room () a ball broke window.
A.when
B.as
C.where
D.while