5. The appliance is sophisticated and should be operated by a technician who is familiar with it.(A) complex(C) effective(B) powerful(D) heavy

I.VocabularyThere are fiften questions in this partof the test. For each question, there are four choices marked ( A ), ( B ), ( C ), and ( D ). Decide which ONE is closest in meäning to the umderlined word or phrase.1. The patient was relieved when her regular checkup turned our all right.(A) surprised(C) pleased(B) shocked(D) puzzled