单项选择题

Directions: In this section, you will hear 10 short news items. After each item, there will be a pause. During the pause, you must read the question and the three choices marked A, B and C, and decide which is the best answer.

How did scientists determine the age of the universe

A. By observing the oldest stars in the universe.
B. By studying the nearest stars that can be seen.
C. By fixing the age of the oldest stars in the Galaxy.

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单项选择题

Each symbol in this table has a value. The total of these values in each row and column is written at the end of the corresponding row or column. Can you find the value of each symbol

A．Triangle = -4.2, Square = 11.5, Diamond = -1.8, Circle = 6.6
B．Triangle = -3.2, Square = 10.5, Diamond = -0.8, Circle = 5.6
C．Triangle = -5.2, Square = 12.5, Diamond = -2.8, Circle = 7.6
D．Triangle = -6.2, Square = 12.5, Diamond = -3.8, Circle = 8.6

填空题

consist