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Although human evolution has _______ in the past 10,000 years, we are changing our environment faster still.

 It began with a “self-discovery” process where each of us _______ a series of tests to determine what it is that we truly love doing.

 The increasing number of cars on the road _______ traffic. This was the reason why we couldn’t get here on time.

(2012·九江高二檢測) The aim of the project is to encourage students to _______ new ideas on networks.

He accidentally _______ that he had quarreled with his wife and that he hadn’t been home for a couple of weeks.

The Adventures of Huckleberry Finn, _______ the USA in the mid 19th century, _______ a masterpiece.

(2012·濟(jì)南高二檢測)—Mum, I can’t see any point in studying hard.
—Come on, dear. Years of hard study will surely _______ in your future career.

To ensure that children from poor areas can receive fair education, the government has planned to _______ more money to improve the miserable conditions of local schools.

The shortage of supplies is________the price.

The hotel wanted to charge $150 for the room service, but we couldn't ____________ to live in such an expensive hotel.