We don’t need a lot of friends _______ they are good.
The room was dark,_________ I turned on the lights.
----________ have you been studying at school? ----For more than four years.
My history teacher said that I ________ do better.
—________did your uncle leave his hometown? —He ________ for nearly twenty years.
The________ woman_______ Shanghai since her husband______ in 1990.