—Who called just now, Sam?—It’s Mona. She asked _____.
Man’s understanding of nature is developing ________. It never stays at the same level.
______ you are middle school students, you should learn to how to look after yourselves.
---What do you think of ____ talent show in our school? ---I should say it was ___ great success.
Which sign tells us the way out of a building?
—__________ move it is!—Yes! I have seen it twice.