单项选择题
The three children looked after their sick mother（）
A. in return B. by turn C. in turn D. in return for
单项选择题 Not until______ the whole thing to him ______that he was wrong.
单项选择题 —What made her so upset —______the necklace ______yesterday.
单项选择题 —Will you come to the party this weekend —______.
