[题目]My sister is years old.tomorrowis her birthday．A．twelve:twelfth B．twelve:twelveC．twelfth,twelve D．twelfth,twelfth 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】My sister is ____ years old，tomorrow（明天）is her ____ birthday．

A．twelve：twelfth B．twelve：twelve

C．twelfth；twelve D．twelfth；twelfth

【答案】A

【解析】

试题分析：句意：我的姐姐今年12岁了，明天是她12岁的生日。twelve 十二，数词；twelfth 第十二，序数词。表示某人的年龄时，用基数词+years old；表示多少岁生日时，用序数词。故选A。

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Ann Makosinski was the only Canadian among the four winners at Google's international science competition. Thousands of young scientists from around the world took part in the competition.

Winning the science and technology competition was "a surprise". Ann said, "I think it will have a great influence on my future."

Ann thanked her family for encouraging her interest in science and said that her first toy was a box of transistors(晶体管).

Ann's prize includes $ 25,000 and a "once in a-lifetime expericnce" from Google for her Hollow Flashlight, which has no moving parts or batteries.

The idea for the invention came from seeing unwanted batteries and her friend's experience. When Ann visited a friend in the Philippines, she saw the friend couldn't study when it became dark because there was no electricity or light. She saw the need for a flashlight that has no batteries - Hollow Flashlight.

In her project, Ann wrote "I made two flashlights that do not use any batteries or harmful materials. They do not create any noise and will always work. The flashlight needs at least a 5℃ temperature difference between the holder's body and the environment around to produce light."

A video of Ann explaining how she creatcd the flashlight has been watched more than 1.4 million times on the Internet.

Though Ann was successful, she has not made a decision about her career path. Ann hopes that she can find a way to join her love of film and science together.

The four winners were chosen from 15 final competitors from eight countries. The competition attracted thousands of students in 120 countries.