You had better ________ some time every day for sports so that you can keep yourself energetic.

I_________for an English test when she came in at this time of yesterday.     

You know great changes _____________ in our school in the past ten years. 

 In the past few years there ________ great changes in my hometown.

---It’s said that scientists have ________ a way to deal with the disease(疾病)---Really? That’s great!