It is common sense that we should omit ______ words in writing telegrams so as to save money. </p></p>

It is common sense that we should omit ______ words in writing telegrams so as to save money. A: essential B: necessary C: superficial D: superfluous

Why does Mr Baker ask Mr Li to make the offer firm for sevendays? A: Because he has to ask his boss for instructions. B: Because he needs to wait for his boss’sarrival. C: Because he needs to get permission from his wife. D: Because he has to send telegrams to his customers.