It is difficult to ________ the implication between the lines.
C
A开始，接触C找出，理解D下来，写(记)下来
Studentsshould_____theirowninterestsaswellasdotheirschoolwork.
Itisimportantto________yourskinfromtheharmfulstrongsunlight.
The book fair has received a positive ________ from readers.
Whenyou're_____acrisis,itoftenhelpstotalktosomeone.