May I go out now. Dad? — No. You __ let your mother know first.

.—Three years has passed. We will study in a new school in several months.—We are supposed to get along well with new teachers and classmates.

My sister can play______violin very well.

Let’s plan a surprise party for our class. What’s your idea?—Why not ________ a short play?

When shall I pay the bill?—Don’t mind it, sir. ________.