1. (2022·铁山港) 根据句意，选择恰当的选项。

A. am   B. is   C. are   D. was    E. were

1. （1） Youa lucky dog.
3. （2） They not late for school yesterday.
5. （3） The baby sleeping now.
7. （4） He short and thin before.
9. （5） Ihappy.