未知题型 We _______ that it will take another four months to finish this plan. A.grant B.estimate C.council D.check

未知题型 If you ask why I plan to study in the United States， the only answer is that it is a _______ for me . A.chapter B.ceremony C.chamber D challenge

未知题型 You have greatly _______us. What you have done is not what you told us about several weeks ago. A.disappointed B.deserted C.clarified D.opposed