(单选题)88: Columbus discovered America but didn't ______ the new continent.
A: invest
B: explore
C: examine
D: find
1.(text)I.VocabularySkills(2points)Whichofthewordsbelowcontainaprefixwithanega...
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1.(完形填空题)1.ListentotheconversationanddecidewhetherthefollowingisTrue(T)orF...