I felt _____ to see her _____ face.

. Many people think that it is ____________making such an experiment.

Glasses are      and must be handled with great care.

(2013 ·辽宁五校第一联合体高三考试)It is universally believed that a student with an extremely ________ mind usually gets high scores in the exams, especially in the physics exam.

---Does Lucy enjoy singing? ---Yes, she does. I have never seen anyone else that is as ________ about singing as she is.