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
Before the Libyan war________, many people put away in safe places possessions they couldn’t take with them.
Success in life doesn’t happen________.It’s the result of devoting your time and energy to what you’ve set out to do.
After losing $20, 000 on my last business, I’m not________this time.
—Everyone in my class passed the exam. —Oh, really?It________difficult.
The manager tried to explain the problem, but what he said didn’t________to the players.