题干
-- ______ father took part in the charity activity in the neighbourhood yesterday?
-- Peter's.
A：Whose
B：What
C：Which
D：Who
答案(点此获取答案解析）
A
-- ______ father took part in the charity activity in the neighbourhood yesterday?
-- Peter's.
A：Whose
B：What
C：Which
D：Who
溶液中是否含有SO