1、根据句意,用括号内所给单词的适当形式填空.

1、根据句意,用括号内所给单词的适当形式填空.
This math book isn't mine.It's my --------（sister）
2、选择正确答案.
Every morning,Alice is------- first to get to school.
A.a B.an C.the D.不填
3、改掉下列句子中的一处错误.
Tom has an English class of an hour every afternoon.
4、根据句子意思级所给首字母提示,补充全句中所缺单词.
S----- comes after Saturday.