—How was your hometown ?—Great changes took place. A. in 1990s B. in the 1990s C, in the 1990’s D. in the 1990s’
--- Don’t run in the hallways. --- ______, I won’t do it again.
In South Korea, most students get to school ________.
It takes ________ half an hour ________ on foot.
We usually play sports _______three hours every day.
What _____ he usually ______ after class?