The most beautiful teacher Zhanglili ________ a mother to her students.—Yes, she is really a good teacher.

I’d like to help ________ /’h?uml?s/ people.

If you still have a problem,you can ask the police ______help.[ ]

_____frightened us ____the electricity was suddenly cut off, which threw all of us into the dark.

There is a door ___ the wall.[ ]