“Cell phone” is a     American usage，but British speakers always use “mobile phone”．

What ______ me was that there was a ______ look on her face due to the ______ problem.

As we all know, ______ medcial examination will help out health problem as early as possible.

There appeared an _____ look on her face on hearing the _____ story.

 “This book is ______ more useful for us students.” “Yes, but it is _______ too difficult.”