单项选择题
While admitting that the forecast was ______ uncertain, the scientists warned against treating it as a cry of wolf.
单项选择题 The teacher asked a difficult question, and finally Todd ______ with a good answer.
单项选择题 Important people don’t often have much free time because their work ______ all their time.
单项选择题 I’m very sorry to have ______ you with so many questions on such an occasion.
