whenwebegintoquestionassumptionsandchallengewhatwethinkwehavelearnedfromourpastchallenge后接what引导宾语从句这里不懂了what在wethink中做宾语并且引导这个句子那么wehave.难道它又做think的宾语

　　whenwebegintoquestionassumptionsandchallengewhatwethinkwehavelearnedfromourpast

　　challenge后接what引导宾语从句这里不懂了what在wethink中做宾语并且引导这个句子那么wehave.难道它又做think的宾语那么what不是在前面做了think的宾语了不懂