她是我的妹妹。
A：She's my sister.
B：He's my sister.
C：She's your sister.
______terrible the weather is these days!
A. When
B. Why
C. in
D. What
Mike: ____ is your favourite season ，Sarah?
Sarah: Summer.
Mike: ____ do you like summer?
Sarah: Because we wll have a party at home 0n Children's Day.
Mike: ____is Children's Day?
Sarah: It's ____ Jane.
第二次世界大战的转折点是（ ）
