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Hình vuông ABCD M thuộc AC, ME vuông góc với AD, MF vuông góc với CD. CMR: a,BE vuông góc với AF b,BM vuông góc với EF c,BM,AF,CE đồng quy KHÔNG CẦN VẼ HÌNH GIÚP VỚI CẦN GẤP !!
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Decide whether the underlined part in the following sentences is Gerund, Perfect Gerund, Past participle or Perfect Participle. 1. She thanked me for having helped her a lot when she was in trouble. III. A. Gerund 2. Having smoked cigarettes for years, he was diagnosed with lung cancer. A. Gerund B.Perfect Gerund C. Past Participle D. Perfect Participle B.Perfect Gerund C. Past Participle D. Perfect Participle 3. Having drunk contaminated water from a nearby river, lots of people in this village suffer from cancers. A. Gerund 4. She always smiles whenever she mentions having met the President of the USA. B.Perfect Gerund C. Past Participle D. Perfect Participle C. Past Participle D. Perfect Participle A. Gerund 5. My boss is considering investing more money in building new five-star hotels and B.Perfect Gerund resorts. C. Past Participle D. Perfect Participle A. Gerund 6. Having missed important lectures on alternative energy, she couldn't finish her oral test on this subject. B.Perfect Gerund C. Past Participle D. Perfect Participle A. Gerund 7. Every member of the team praised him for having helped the team win the championship. A. Gerund 8. Having experienced a sharp decline in profits, the company has to dismiss a large number of employees. B.Perfect Gerund B.Perfect Gerund C. Past Participle D. Perfect Participle B.Perfect Gerund C. Past Participle D. Perfect Participle

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