If you want to make your friend not be too nervousbefore the final exam, you say:_______.

(2013·吉林四校高三一诊)I really don’t know how to thank you, but for your help, I ________ my lost necklace.

Is there ________ in your lost handbag，Mrs Green—Yes，my ring is in it.

My grandparents are old, ______ they still work in the fields every day.

The problem is hard but Tom has_____a good idea to solve it.