act as hosts to many insect pests .insect和pests并列做什么成分啊,都是名词

填空：Birds are the natural (e ) of many insect pests. insect什么意思 not to be left behind are the disease-spreading pests the flower I bought yesterday was resisitant to pests,____at A visit to insect museum insect的复数 什么意思? （D）1.Spiders are not an insect,as many people think,____even Many people are ___ to insect bites,and some even have to go insect haunting insect-active Which insect do you like?什么意思 make crops resistant to pests 这种用法对吗,make 后不是加动词吗