As I joined the big crowd,I got ________from my friends.
As they were walking around, they noticed a man _______ against a tree.
Today, when scientists examine mummies, they wear special clothing for protection _____ they breathe in harmful gas.
Wow! That’s Uncle Sam. Now he’s in Paris, _____ he?
When _____ what is most important in life, some choose money, ____ others choose friendship.
—Why haven’t you asked her to come here? — She _____ an important experiment when I found her and she _____ it.