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
After ten years of hard work, they at last got _________.
—Would you like some more chicken? —No, thanks. I’m ___ a diet and try to ___ weight.
________of both sides, the two companies decided to _______ to become more competitive in the global market.
The letter reminded me _______ the good time we had spent together.
They got lost in the desert and starved _____ death.