2. 外语
  3. When bird watchers find a nest, they are very careful not to disturb it lest the mother bird______ frightened and desert it

When bird watchers find a nest, they are very careful not to disturb it lest the mother bird______ frightened and desert it

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问题 When bird watchers find a nest, they are very careful not to disturb it lest the mother bird______ frightened and desert it
选项 A、should be
B、will be
C、may be
D、could be
答案A
解析 lest唯恐，以免。后面的宾语从句用虚拟语气，其形式一般是should接动词原形。用于fear，beafraid之后，等于that。
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