Planning our vocation we must take the frequent______of the weather into consideration.A．t

A．Nature changed our environment over the years.B．We must avoid wasting resources and

What must we understand in order to be successful in our training programs？A．The differenc

We must strengthen our _____ on the western border.A) offenseB) defectsC) defenseD) de

We must focus ______ our sales force as the chief means of improving trade.

We must try to preserve the best of our mo

We must try to【 preserve】 the best of our moral v