I was about to leave the office ______ an unexpected visitor came.A. while B. as C when D. before
--It looks rain. Shah I take an umbrella for you? --________.
Jack had ______ feeling of excitement when hearing his article published in ________ school magazine.
High house prices can be brought under control ________ the government takes some necessary measures.
The little girl often has a ________ pull at her mother’s clothes when they cross the street.
China is still an agricultural country and peasants ________ most of the population.