I wish I ____ you yesterday.
______ carefully if any change occurs when doing experiments in the lab.
Jane is in a hurry because the train to the airport leaves ______ half an hour.
--- Hi, let's go skating.--- Sorry, I'm busy right now. I ______ in an application form for a new job.
Some animals carry seeds from one place to another, ______ plants can spread to new places.
--- With the graduation time coming,l feel so sad to part with friends.--- Cheer up.______