10 The conclusion can be deduced from the premises

　　A gone

　　B derived

　　C done

　　D come

　　11 The food is insufficient for three people

　　A scarce

　　B short

　　C marginal

　　D inadequate

　　12 Most of the butterflies perish in the first frosts of autumn

　　A die

　　B disappear

　　C migrate

　　D vanish

　　13 But ultimately he gave in.

　　A undoubtedly

　　B certainly

　　C finally

　　D necessarily

　　14 It is a complicated problem.

　　A strange

　　B complex

　　C difficult

　　D unusual

　　15 In Britain and many other countries appraisal is now a tool of management-

　　A evaluation

　　B production

　　C efficiency

　　D publicity