Kate's dad is getting old. She will go back home to see him _____it is convenient.
I didn’t hear your call because I__________to music at that time.
--- May I go swimming now? --- No, you ______. You must finish your homework first.
Her son __________ Coke, but now he __________ milk.
—______? —I have a headache and I don’t want to eat anything.
-Mr Li lives______, but he doesn’t feel _____because many volunteers often visit him.