Each year in the United States, many black teenagers _______ of school, either because they cannot keep up or they have to work to support their family.
A、gooutB
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I'msorryIforgottowrite;Ihadsomuchelse________mymind.
________withthesizeofthewholeearth,thehighestmountainsdonotseemhighatall.
________somanypeopleintheUnitedStatesbeenoutofworkastoday.
Theproblem________whenthestudentsrefusedtodotheirhomework.
GeneralMotors,oneoftheworld'slargestautomanufacturers,isexpandingits________inthiscountry.
