1.The letter wasn't addressed to me but I opened it out of _____ (curious).

2.They were having an _____ (argue) about whose turn it was to do the cooking.

3.My first _____ (impress) of him was that he was a kind and thoughtful young man.

4.Every time I fail my exam and begin to lose heart, the sight of my motto inspires me with much _____ (confident).

5.The end of the project is almost _____ sight, so we need to work harder to complete it as soon as possible.

6."Cat slaves" refer _____ people who adore their cats in cat culture among young people.

7.To her __________ ( embarrassed)£¬she couldn’t remember his name.

8.Mr Smith is senior ____________ me. though he is younger.

9.After school, the students went out of the classroom one__________  one.

10.An__________(explore) is someone who travels to unknown places in order to discover what is there.