I can't have managed without your support and encouragement；I really __________ this．
A.thankB.appreciateC.meetD.need在线课程B
thank表示“感谢”常用于“Thank sb．for(doing)sth.”句型；而appreciate表示“赏识/高度评价”某人某事或某物，答案为B.例如：
Not many of us can appreciate old Beijing Opera．
我们没有多少人能够欣赏旧京剧.
He appreciated our work above our deserve．
他对我们的工作给予了很高的评价.
The play was much appreciated by the audience.
这出戏受到了观众的好评．
Their performances were greatly appreciated．
他们的演出受到了欢迎.