_________ he is, he has a wide range of knowledge.
22. This book ________ 20 articles, ________ three written by his daughter.
第二部分选择填空（共20小题；每小题1分，满分20分） 21.—Have you seen _______ pen? I left it here this morning. —Is it _______ black one? I think I saw it somewhere.
35．The highest award was given to Anna, who_________so hard on the project for years, and at last her efforts paid off.
34．Take the lift to the eighth floor and turn right. You_______have any trouble finding my office.
33．The highway through the rain forest was completed in 1990, _________some animal species have died off.
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