在教材编写过程中，课程内容前后反复出现；且后面的内容是对前面内容的扩展和深化。这种教材编排方式是（ ）。

(单选题)Bill is always full of ideas, but ______ is useful to me. (单选题)Since we are here, let’s ______ some important work. (单选题)A sudden stop can be very dangerous, ______ if you are drivi (单选题)The doctor suggested her not ______ cold food these day. (单选题)I’ve got something ______ to tell you! I saw Chris Lee, the (单选题)You should make it a rule to leave things ______ you can fin (单选题)There ______ some juice, two eggs and a few cakes on the tab (单选题)Give me your email address, ______ I will send you the photo (单选题)I feel it hard to keep up with my classmates in Physics and (单选题)—I wonder ______ you’ll water the flowers.—Once a week.