Choose proper word to complete sentence.( 填单词前面的字母 ) A critical B appropriate C workspace D correspondence E issues F probably 1. These talks are ___________ to the future of our company. 2. A business letter needs to be written in a(n) ______________ style. 3. Our key customer will __________ place two big orders with us this month. 4. All __________________ to the key customers must be read by the boss before being posted. 5. You should discuss any _____________ that worry you with your boss. 6. If your ______________ is not big, you can always use the conference room for your meetings with the customer.