单元：List-07.txt

• worried
• wave
• what
• rare
• outdoors
• gentle
• equal
• difficulty
• always
• prejudice
• pattern
• understand
• cost
• shall
• way
• ceremony
• effect
• civilian
• prepare
• whether
• someone
• countryside
• account
• process
• achievement
• host
• awful
• trade
• contribute
• travel
• excite
• thinking
• recognize
• show
• beneath
• education
• fear
• form
• murder