What was he doing ______ his father _______ back?A. while; came B. when; came C. when; was coming
—Wow, your new car looks so cool! —Thank you very much! I _____ it for two weeks.
Both teachers and students _____ not to use mobile phones in class in our school.
The man _____ his coat when he walked into the warm room.
—Look at the sign. You_____ fish here. —Sorry, I didn’t know.
_____ wonderful news report he wrote! All of us were satisfied with what he did.