Theories have features that are (indicative) of their truth, and the. task of justification is to identify these features and (using them) to guide choices (as to) (which theories) to believe

单项选择题(To be measured) in terms of its members, teaching is (the world's biggest profession). Though the roles and functions of teachers (vary from country to country), the variations are generally greater within a country than (they are) between countries.

单项选择题The Second Hague Disarmament Conference of 1907 was marked more by discord than discourse, a sign of the deteriorating world situation.