ng the room,I found Mary____ at the desk and____a letter.

These photos ______ on the Great Wall last week.

It is believed that universities are a place ________ students ________ skills and knowledge, not a factory to produce street vendors.[ ]

What the remote areas need ____ educationto children and what the children need ____ good textbooks at the moment

An old man was found ______ in his house. Luckily, he was taken to hospital in time.