make a contribution/contributions to...对......作出贡献

　　She continued to contribute articles to sports magazines. 她继续为体育杂志撰稿。

　　Some public service advertisements mainly aim to make contributions to society.

　　一些公益广告的主要目的是为社会作贡献。

完成句子

①吸烟会导致肺癌吗？

　　Does smoking ________________________lung cancer?

同义句转换

②He offered to contribute to the Red Cross.

　　He offered to ___________________________ the Red Cross.

2．John Logie Baird constructed the first colour TV in 1928，but it_was_not_until_1938_that the first colour TV programme was broadcast.

　　翻译：________________________________________________________

句中运用了not...until的强调句式：It is/was not until...that...

　　It was not until midnight that I could go to sleep.

　　我直到半夜才得以入睡。

　　It is not until you really lose something that you finally realize how important it means to you.有些东西，只有在你真正失去的时候才会感到它对你是如此重要。

　　①强调句的基本结构：It is/was＋ 被强调部分＋that/who＋其他成分.

　　②强调句的一般疑问句式：Is/Was it＋被强调部分＋that/who＋其他成分？

　　③强调句的特殊疑问句式：疑问代词/疑问副词＋is/was＋it＋that＋其他成分？

　　It is a professor from Nanjing Normal University that/who is going to give us a lecture. 一位来自南京师范大学的教授要给我们做报告。

　　Was it in Sydney that you saw some kangaroos? 你们是在悉尼看到袋鼠的吗？

　　When was it that you arrived at the airport? 你是什么时候到达机场的？

"not until＋时间状语(从句)"置于句首时，句子主句要用部分倒装。

　　Not until last week did they find the lost bike.

　　直到上个星期他们才找到失踪的自行车。

句型转换

She was not able to go back to work until her child grew up.

③________ her child grew up ________ she was able to go back to work.

④________ her child grew up ________ able to go back to work.