Mary is very clever and worth teaching, but her brother is not. Look, he is now asleep in class.
A. very, very
B. much, very
C. well, very
D. well, fast
网友回答
A. very, very
B. much, very
C. well, very
(答案→)D. well, fast
解析：第一空考查短语：值得做某事 be worth doing ，非常值得做应用well修饰，第二空为固定短语：fast aslepp熟睡，所以选D。