31.Which of the following about achievement tests is NOT correct?
(A) Achievement tests are designed to measure learners’ language and skill progress in relation to the syllabus they have been following.
(B) Achievement tests give a general picture of a student’s knowledge and ability.
(C) Achievement tests only work if they contain item types which the students are familiar with.
(D) Achievement tests can help us to decide on changes to future teaching programs where students do significantly worse in the test than we might have expected.