用适当的词填空。

1. Dolly, the first cloned sheep died _______ lung disease in 2003.

2. Scientists can take DNA ______ one kind animal and put it ______ another kind of animal.

3. If you had a sister or brother _______ to you, how could your mother tell you apart?

4. What ________ people all over the world went to the moon?

5. Have you ever see a cow ________ horse's face?