20. She stayed with him ... he fell asleep. A. as soon as B. after C. until

Translation of the instruction: Обведите правильный ответ.

Answer: She stayed with him until he fell asleep. (Она оставалась с ним, пока он не заснул.)

Explanation: Until means that she stayed there up to the time when he fell asleep. (Until означает, что она оставалась там до того момента, когда он заснул.)