12. —– Why don’t you do some shopping in the second-hand store ? —— Well, the goods there are _____, but _____.

What _____ are you guys doing I amfreaking out(我很不安).

.With an electronic typewriter ,we can get evenly typed characters regardless of the pressure ________we strike the keys

______ useful robot! It can help with the housework like a human servant.

When did the manager decide to construct the theory of management — It was last month ___________ the management system suffered from a drawback.