___ the beginning of the meeting, the president made a speech ___ how to reduce pollution.
A．a(chǎn)t; inB．a(chǎn)t; onC．in; onD．on; on
B解析:
固定搭配at the beginning of在…的起初。on表示關(guān)于某種問題。
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科目：初中英語 來源：同步題 題型：填空題

用所給單詞的適當(dāng)形式填空。
1. Thanks a lot for______(give) me the book.
2. —Thank you for_______me to your party. But I call't accept (接受) your_______because
I have a lot of work to do.
    —That's a11 right. I also______Lin Tao and Jim to come. (invite)
3. Jim______(beginn)______(learn) Chinese two years ago.
4. The old man asked the policeman______(help) him.
5. We______(get) ready for a party now.
6. He is a______(luck) boy.
7. Thank you for______(help) me.
8. There are two basketball______(match) tonight.
9. Do you know that girl? She comes from an______(America) city.
10. He often goes______(fish) in the park.

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