21. At the party, he was_______ by her beauty and charm.
A. excited B. satisfied C. impressed D. surprised
【解析】选C。句意：在聚会上，她的美丽和魅力给他留下了深刻的印象。impress给……留下深刻印象。
22. —The dustbins_______ for three weeks.
—In fact, they_______ once a week.
A. haven’t emptied; should have been emptied
B. haven’t been emptied; should be emptied
C. haven’t been emptied; should have emptied
D. haven’t emptied; should have emptied
【解析】选B。根据句意，第一个空应该用现在完成时态的被动语态；第二个空为情态动词的被动语态。
