—Excuse me, Maria. Can I use your bike?—Sure. Here you are. But you must return it _____ time.
— Li Ming, do you know _______ this year? —It’s on June 20th.
He ate a lot and did little exercise, so he _______ 10 pounds.
— This is your order, a sandwich and an apple pie. _______ — I’ll have it here.
I _______ with my parents when he rang me up yesterday afternoon.
What does the sign mean?