21, A lot of research and studies have shown that Trench oil, taken out from kitchen waste, ______ the increase of cancers.
A, results from B. attends to C, contributes to D, devotes to
22, After retiring from her job, she has decided to _____ a language school _______ poor Migrant workers’ children.
A, set out; targeted B, set about; targeted C, set off; targeted D, set up; targeting
