—Nowadays in Britain, _____ calculators can be used freely in school exams.
—Do you think a calculator is______ must?
A.不填;the B.the; a C.the; the D.不填;a
—Nowadays in Britain, _____ calculators can be used freely in school exams.
—Do you think a calculator is______ must?
A.不填;the B.the; a C.the; the D.不填;a
D