His aunt’s letters ________ memories of those beautiful days when they used to live together in his hometown. 

You see, she’s losing her temper now. Let’s ______ her ________.

Anne felt nervous ____ she gave a speech in front of so many students.

We are waiting until the weather ________ a little.

It is reported that in our country cities ________ heavy air pollution that is 30 percent above the national standard or higher should try to meet standards by 2030.