在线名词解释大全

专业、全面、易懂的全领域名词百科

Directions:Thereare20sentencesordialoguesinthispart.ForeachsentenceordialoguetherearefourchoicesmarkedA,B,CandD.Choosethebestonetocompletethefollowingsentences.ThenmarkthecorrespondingletteronAnswerSheet.Mostanimalshavelittleconnectionwithanimalsofadifferentspecies,______theyhuntthemforfood.

题型：单选题

选项

A. A. if

B. B. while

C. C. unless

D. D. as

正确答案：