—Can I borrow your book?—________A. Yes, you can.B. It doesn’t matter.C. Sure, go ahead.
--- 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?