Theaddressbook________theemailaddressesofyourfriendsorgroupsofcolleagues.
________withthesizeofthewholeearth,thehighestmountainsdonotseemhighatall.
In the future, more ______ should be placed on the education of the young.
EachyearintheUnitedStates,manyblackteenagers_______ofschool,eitherbecausetheycannotkeepuportheyhavetoworktosupporttheirfamily.
The engine has broken and the boat is ______ on the water.