Alice is famous ________ her paintings.
---It is selfless ______ the doctor to devote all the time he had ________ for the patients. ---I think so, they are so great.
China began to open to the outside world in the late 1970s. _________, there have been great changes in the country.
---I met Daniel in the street yesterday, I ________ him since he left for Beijing.--- Well, does he look like what he used to be?
The social worker asked Daniel ______________.
The old man keeps coughing________. I’m afraid you have to send him to hospital.