2 Sandy always teaches evening classes, but today she is _____ for a sick teacher in the morning class.
(A) searching
(B) substituting
(C) striving
(D) stalking
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統計: A(62), B(555), C(109), D(32), E(0) #2910822
統計: A(62), B(555), C(109), D(32), E(0) #2910822