___ research ___ the universe scientists have put a lot of information ___ computers. [ ]
. I didn’t sell it. I _______it ________.
I feel it hard to keep up with my classmates in study and sometimes I lose heart. But whenever I want to ________ , my teacher always encourages me to work harder.
Mom, these are my friend Peter and __ brother Bill.–Welcome to our home. Come in, please.
Do you know _____I saw yesterday? It was my favorite star, Jackie!