用when或while填空——Margo was talking on the phone,her sister wal

——Margo was talking on the phone,her sister walked in.

____we visited the school,the children were playing games.

_____Allen was akeaning his romm,the phone rang

He was driving along_____suddenly a woman appeared

______Jake was waiting at the door,an old woman called him

He was reading a book_____suddenly the telephone rang

____it began to rain,they were playing chess

She saw a taxi coming_____the woman was waitingg under the streetlight

i was cleaning my room_____my mother was cooking

what were you doing_____the weacher came in?