题目内容
(请给出正确答案)
[主观题]
The phrase "once in a blue moon" in last line refers to ______.A.all at onceB.once for a l
The phrase "once in a blue moon" in last line refers to ______.
A.all at once
B.once for a long time
C.once in a while
D.once and for all
如搜索结果不匹配,请 联系老师 获取答案