________ in a white uniform, he looks more like a cook than a doctor.

Is it normal that in September hotels near universities are overcrowded, _____ many parents from a distance nowhere to stay but to sleep on the playground ?

________ the course very difficult，she decided to move to a lower level.(2013·北京，24)

.________ that he had wasted a lot of time, Tom decided to work hard on his study.

Remember never to leave your dog ______. It might bite people around.