Срочно
16.Children went for a walk … switching off the light. (with, without, before)
17.We were surprised … meeting Alice at the theatre. She was going to stay at home on that day. (at, by, with)
18.Sorry … interrupting you, but could you show me the way to the nearest cinema? (for, at, of)
19.We have improved our English … learning the new words and rules every day. (by, for, with)
20.Pamela was looking forward … visiting London again. (to, on, about)