_____, the car stopped all at once.

____time goes by, Mother’s hair is turning gray and the wrinkles on her face deeper

John, you goout to play until your homework .—OK, Mum.

One of a layer’s tasks is to _____ legal guidance to people in need but a certain _____ of fee is charged.[ ]

Some researchers believe that there is no doubt ______ a cure for AIDS will be found.