Do you know the difficulty he has ___ (understand) what trav

Do you know the difficulty he has ___ (understand) what trav Do you know the difficulty he has ___what eco-travel means? Do you know the difficulty he had finishing the work do you know the difficulty he had________the work(finishing) 紧急:Do you know the difficulty he had____the work?为什么选Finishi What did you do to help them ___ the difficulty?a.out from b Do you know his difficulty he had ____ his family? do you know ___(he)? do you understand what he said? Do you know what was worng with the boy?Do you know what ___ His work has ___ his health.The doctor suggests that he trav Do you know what is new __-the pop ___?