27. Nearly four hundred supermarkets in Beijing are preparing to dim their lights ________ the "Earth Hour 2010" on Saturday night.
A.honor | B.honoring | C.to honor | D.having honored |
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27. Nearly four hundred supermarkets in Beijing are preparing to dim their lights ________ the "Earth Hour 2010" on Saturday night.
A.honor | B.honoring | C.to honor | D.having honored |