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【題目】How will the man come back?

【題目】The number of the students studying in the university _______more than 50,000.

【題目】The helicopter arrived on the scene quickly to the survivors.

【題目】— Tommy, you seem to be overjoyed!

【題目】Because of the poor defence work, the flood overflowed the riverbanks, ________ frequently happened in that area last decade.

【題目】I think my father is a hero. He is not only strict ________ us but also strict ________ his work.

【題目】In addition to John and Helen, their cousin ______ visit us next month.

【題目】It is estimated that 12.79 million new urban jobs have been created this year, which almost doubles _____ it was last year.

【題目】The Oxford Dictionary is useful for you to learn English, so you'd better buy _____.

【題目】―Why are you so excited?