Youmustpayimport____oncertaingoodsbroughtintothiscountry.
D
【句意】 带入本国的某些商品要交进口税。
【难点】 duties意为“税，关税”;bill意为“帐单”;fee意为“费”。
Every means ____ tried out but never with success, as far as my knowledge goes.
Physics is the present day equivalent of ____ used to be called natural philosophy, from ____ most of present day science arose.
Sometimes a bus ____ gets on the bus to check the tickets.