Поставьте частицу "to" там, где это необходимо.
1. Mother let her children ... watch the film.
2. I want you ... understand me.
3. He helped his friend ... repair his car.
4. Our teacher makes us ... work very hard.
5. Helen felt her brother ... tell lies.

1. What is Helen doing in the kitchen?  She is cooking. 2. What were you doing in the shop? I was buying food. 3. What is she doing with the dress? She is trying on the dress. 4. What was Ann doing at the railway station? She was meeting her friend. 5. Why were the children making such a terrible noise? They were fighting. 6. Why isn't she sleeping? She is waiting for her son.7. Why are you speaking in a whisper? My baby is sleeping now. 8. Why was Peter playing the piano so late? He was rehearsing. 9. What was Bill doing here? He was looking  for a book. 10. What were you speaking about when I came? I was  discussing my future travel.

Road signs
speed limit: 60 — ограничение скорости 60 миль в час (равное 100 км/ч)
detour — объезд
no overtaking — обгон запрещен
overtaking permitted - обгон разрешен
yield - уступи дорогу
yield at roundabout - уступи на перекрестке (на нерегулируемом перекрестке)
traffic circle — кольцевое движение
do not enter - вход запрещен
no left turn - правый поворот запрещен
no right turn - левый поворот запрещен
no U-turn — запрещен разворот
public parking - общественная стоянка
no parking- стоянка запрещена
auto repair — ремонт машин
car wash — мойка машин
railroad crossing — ж/д переезд
road closed — дорога закрыта
one way — одностороннее движение
pedestrians prohibited — проход пешеходов запрещен
no motor vehicles — движение запрещено
right (left) lane must turn right (left) – из этого ряда только направо (налево)