Jacky is so careless. He my books and pens the floor when he walked past my desk just now.
These photos ______ on the Great Wall last week.
Beijing, the capital of China, is one of _________ cities in the world.
He will send me a message as soon as he _________ in London.
While I ______ with Lily, the school bus came.
Jason was ill yesterday, ________ he didn’t go to school.