It was _____ by the railway board that the cost of rail fares would be increased by ten percent.
—Why din’t you come to my birthday party last night? —I was going to, but I was _______ occupied with something important.
Researchers found that people who drank excessively were twice as likely as those who drank regularly ______ ischemic(出血性) heart attacks.
—What do you think of her performance in the match?—He _______, but today was not his day.
—Did the two parties reach an agreement?—Yes, but the final proposal was a _______ betweem profit and envrionmental protection.
It’s difficult to _______ who will be elected to chairman of the Student’s Union, for the two candidates are well-matched.