By the end of this year, a new library ________ in our school.
A would be completed                                           B will have been completed
C had been completed                                             D was being completed
B
考查時態(tài)。By與完成時連用，the end of this year是一個將來的時間，使用將來完成時。句意：到今年年底，一座新的圖書館在我們學校將已經(jīng)被建立。
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