He left his native village twenty years ago and has _____ returned only twice.（4分） A late B never C since D hardly

问答题He left his native village twenty years ago and has _____ returned only twice.（4分） A late B never C since D hardly

问答题Our research found out the drug is so ______ as to be able to change brain chemistry.（4分） A powerful B huge C energetic D efficient