. Mary has lived in China for 3 years, so she ______ to the life here.
They travelled around _____ Changchun by _____ bus.
John rushed out in a hurry, _____ the door _____ .
Please come to visit me if _________________.
---Why do you look so sad? ---There are so many problems_______.
Even the __________ doctor couldn’t cure him __________ his deadly disease.