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
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D解析 题意：玛丽很聪明，很值得教，但是她的弟弟不。看他正在课上熟睡呢。be well worth doing sth. 很值得干某事；fast asleep 熟睡。