---What are you going to do this weekend ?--- Well, we’ll clean up the city parks ________ it rains..
An English speech to the children tomorrow.
Old people should ________politely.
A terrorist attack at Kunming Railway Station ,and 29 people in the event .
— Have you finished your project? — Not yet. I’ll finish it if I ____________ ten more minutes.
— Our classroom every day. — So it is. It is our duty to keep it clean and tidy.