It isn’t socially __________ for parents to leave children unattended at that age.
The girl carrying a dictionary, come in first, ______?
---Why do you pay a visit to your parents ________?---_______ they live in a remote village far from here.
--- When shall we restart our business?--- Not until we _____ our plan.
________ the severe damage caused by the earthquake in Sichuan on April 20th, 2013, people in the earthquake-stricken areas show great courage and determination.
---Where did you get to know her?--- It was in Harbin No. 3 High School ______ we studied.