____ it was late, the students were still studying in the classroom.
Food safety is important. Rulesto stop people from food pollution. A、must make B、must be made C、can’t be made
Shein 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