1. Many difficulties ______ (出现) in the course of their experiment，which was beyond our expectations.
2. There is another kind of beauty that has nothing to do with ______ (外貌)，but comes from the heart.
3. It was just her childhood experiences that affected her ______ (性格) and later life.
4. Please ______ (打字) this letter for me.
5. Let us ______ (探索)the possibilities for improvement.
6. They achieved their ______ (目标) of increasing sales by five percent.
