She looks very happy. She ______ have passed the exam.—I guess so. It’s not difficult after all.

Your article is too long. You must _______ to about 3000 words.[ ]

________it is，the boy never seems to be able to finish it off.

下列加点的词语不属于偏义复合词的一项是（ ）

Dr. Peter Spence, ______ headmaster of the school, told us, “______ fifth of pupils here go to study at Oxford and Cambridge.”