Read the following passage and fill in the blanks with the correct words.

When a light passenger plane flew off course some time (1) , it crashed(2) the mountains and its pilot was killed. (3) only passengers, ayoung woman and her two baby daughters were unhurt. It was the (4) ofwinter. Snow lay thick (5) the ground. The woman knew that the nearestvillage was miles (6) . When it grew dark, she turned a suitcase (7) a bed and put the children inside it, covering them (8) all the clothes shecould find. During the night, (9) got terrible cold. The woman kept as nearas she (10) to the children and even tried to get into the case herself, but itwas too small. Early the (11) morning, she heard planes passing overheadand wondered how she could (12) a signal. Then she had an idea. Shestamped out the letters “SOS” in the snow. Fortunately, a pilot saw the signal andsent a message (13) radio to nearest town. It was not (14) beforea helicopter arrived on the scene and (15) the survivors of the plane crash.