本讲为2006年下半年新的教学内容，请对照教材听录音。     carefully by the babysitter.   Look for   look after   I am looking for my watch.   The watch is being looked for.   There is a book on the table.   There are 3 books on ..   one of the girls is my student.   The headmaster and the secretary __ (be) present.   S/he   happyquhang@sohu.com   mercy killing   weaken  v.  削弱，减弱   You could see the dog weakening daily as the disease spread through its body.   They were weakened by hunger and climbing became difficult.       deteriorate  v. （使）恶化   The countrys economy has been deteriorating for some time.   She was taken into hospital last week when her condition suddenly began to deteriorate.       debate  v.  争论，辩论   They had been debating for several hours without reaching a conclusion.   n.  争论，辩论   Education is the current focus of public debate.   legal adj. 法律上的，合法的   Is abortion legal in your country?   criterion  (pl. criteria)  n. （批评，判断的）标准，准则                                The criterion I apply to any problem is What will make me happiest?