Directions: The following passage has some blanks, each of which has been numbered. Find out the appropriate word and fill blank (7).

If the advantages of international trade and division of labour are as strong and __(1) as economists assert, the students of international trade may well be puzzled by the _(2) to which governments impose _(3) on their __(4) trade. The actions of governments, however, are not entirely by economic __(5). When a country aims at economic self-sufficiency, the reasons are generally _(6). For example, a country may wish to __(7) its farming industry in order to be able to feed itself in time of war, or it may try to build an iron and ore industry as part of an industrial programme. If a conference is called to consider a reduction of ___(8), a country that had imposed no restrictions on imports would find itself at a _(9), since it would have no ____(10) to offer.