题目内容：
请在第（59）处填上最佳答案。
A．believes B．is believed
C．is believing
D．believed
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答案解析：
单选题：请在第（59）处填上最佳答案。
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B．is believed
C．is believing
D．believed
B．is believed
C．is believing
D．believed
The word confidential in the last paragraph could best be re
The word confidential in the last paragraph could best be replaced byA．concise B
回答第53空。
回答第53空。A．A mostly B．B likely C．C clearly D．D surely
根据下列短文，回答题。Avalanche and Its SafetyAn avalanche is a sudden
根据下列短文，回答题。Avalanche and Its SafetyAn avalanche is a sudden and rapid flow of sn
请在（47）处填入最佳答案。
请在（47）处填入最佳答案。
Why did Dr．Baum come to a British national park?
Why did Dr．Baum come to a British national park?A．Because he needed to present i