— Haven’t seen you for ages! Where have you been?— I____ in Xinjiang for one year, volunteering services as a doctor.
The father, ready to retire at an early age, hoped that his eldest son would ______ the family business.
My sister-in-law is the ______ of the information, so it cant be false.
--I believe that more effective measures have to be taken before we can breathe cleaner air. --______. Air pollution has become too serious a problem.
Only when our project has been approved of by the committee ______ to carry it out.
We are lucky to be among the generation of people who have ______ and experienced the great social changes in our country.