Answer:
I am a time for gathering crops. Remove the first three letters and I become an object you can wear.
I'm a precious stone in a pack of cards. What am I?
An action done on mosquito bites
I am the beginning of eternity the end of time and space the beginning of every end the end of every place.
I can run but not walk. Wherever I go thought follows close behind.
I tell people to be careful when handling boxes.