<單字複習>
已選單詞
agreement
apparatus
barter
boutique
business
buy
collection
commerce
commitment
contract
crew
deal
device
duty
employee
equipment
exchange
gear
group
instrument
job
kit
labor
mall
market
oath
obligation
personnel
promise
purchase
responsibility
sale
sell
set
shop
staff
store
supermarket
task
team
tool
trade
transaction
vow
work
worker
