单项选择题
A.elect B.special C.select D.selective
A.economic B.economies C.economics D.economical
A.easy B.easily C.serious D.seriously
A.owing B.thanks C.due D.because
A.taxes B.duty C.fines D.fees
A.go out B.drop out C.check out D.pull out
A.dropped in B.dropped off C.dropped out D.dropped down
A.flowing B.floating C.drifting D.sailing
A.turning B.setting C.driving D.putting
A.of B.for C.to D.with
A.enlightening B.confusing C.frustrating D.delighting