_____ about the safety of her son, John’s mother looked upset．

Then professor walked onto the platform and seated himself in a chair, ______ for answering questions.

Elizabeth Blackwell, who in 1849 became the first woman ever     a medical degree in the USA, fought         women’s rights bravely.

单项选择（每题1分）She opened the window, _____ in some fresh air.

I’ve never dreamed of _______a picture on the wall.