Sam spends two hours _______ his homework every day.
Food safety is important. Rules to stop people from food pollution.A、must make B、must be made C、can’t be made
She in a toy factory, but now she has a shop of her own.A、is used to work B、was used to work C、used to work
I can’t wait ____ the present box.
The box is ________ heavy ________ I can’t lift it.
Everyone is supposed ________ a seat belt in the car.A. wearing B. to be worn D.wear D. to wear