after half an hour's explanation,the teacher made the instruction （ ）by the students at lastA.to understand B.understoodC.understandingD.to be understood

after half an hour's explanation,the teacher made the instruction （ ）by the students at lastA.to understand B.understoodC.understandingD.to be understood
after half an hour's explanation,the teacher made the instruction （ ）by the students at last
A.to understand
B.understood
C.understanding
D.to be understood

after half an hour's explanation,the teacher made the instruction （ ）by the students at lastA.to understand B.understoodC.understandingD.to be understood
B
让instruction被理解