I was playing with my phone when my mother came in． （改为否定句）
I with my phone when my mother came in．
I talked to him on the phone yesterday. （改为否定句）
I to him on the phone yesterday.
Of the three cities，Ningbo，our hometown，is the （生机勃勃的）.
Yuan Longping，the "Father of Hybrid Rice"，won many （奖） for his rice research.
If we don't protect the environment well，we'll be （惩罚）sooner or later.
To help my parents live a better life is （确切地） what I want.