28) During ［A］ the seventeenth century the most ［B］ colonists were primarily concerned with ［C］ D)] economics ［D］ and defense.
解析：B錯。 改為most。
29) Belgium, in the ［A］ 19th century, rapid ［B］ grew into ［C］ an industrial ［D］ country.
解析：A錯。改為rapidly。
30) The Lost Colony in North Carolina mysterious ［A］ disappeared between ［B］ 1587 and 1590, when its ［C］ founder returned from a visit ［D］ to England.
解析：A錯。改為mysteriously。
31) Many flatworms have of eyes.
［A］ more pairs than one
［B］ more than one pair
［C］ one more pair than
［D］ one pair more than
解析：B為正確答案。
32) Of the two houses the family prefers .
［A］ the most isolated one
［B］ the one isolated more
［C］ the more isolated one
［D］ the isolated one more
解析：C為正確答案。
33) Freezing is at present one of the of preserving meats and vegatables.
［A］ most methods are important
［B］ methods most important
［C］ most important methods
［D］ most are important methods
解析：C為正確答案。
34) The radio was of so ［A］ inferior quality that ［B］ I took it back ［C］ and asked for a better one ［D］ .
解析： A錯。 改為such。