A．should inform B．can recommend C．have reminded D．could……

单项选择题New peace proposals _________ at the recent Middle East conference.

单项选择题One of the worst things that can happen when you are in the _________ for composing is a total lack of ideas.

单项选择题Sumac, Inc. submitted their bid after the deadline; _________, they were not eligible for consideration.

单项选择题And, _________, if you're going to be gone for a while, say on vacation, Dr. Michael Fox suggests you keep in touch with him by email.