The microphone _______ them to keep in touch; in other words, it made it possible for them to contact each other.
All the pictures in this book, ______ otherwise stated, come from those taken by Miss Brown.
---I acquired ______ Van Gogh from a businessman from Paris the other day. ---Really? Are you sure it’s ______ real one?
The soldiers soon reached ________ was once an old temple ________ the villagers used as a school.
After Chang’e-3 landed on the moon on Dec 14, China became the third country _________ this after the US and the former Soviet Union.
---Excuse me, has the train from Beijing arrived yet?--- ________, you are three quarters earlier. It's only 9 now.