单项选择题
The time he has devoted in the past years______the disabled is now considered ______of great value.
单项选择题 Is it true______the snow stops, it will be as hot as in the summer here
单项选择题 —I wonder why Mr. Brown hasn’ t showed up at the meeting yet.—I’ m not sure, but he______in a traffic jam driving here.
问答题 【B3】
