15. An awful crash between an express train and a bus _____ , however, occur the other day in Russia.A. does B. did D. has to D. had to
Life is unpredictable; even the poorestbecome the richest.
I don’t believe what you said, but if you can prove it, you may be able to _________-me.
Among the many dangers_________-- sailors have to face, probably the greatest of all is fog.
Anyway, we’re here now, so let’s ___some serious work.
When it comes to __ in public, no one can match him.