Bài 3 : Cho 1/x +1/y +1/z =0 Hãy tính giá trị biểu thức A= xy/z +xz/ y^2 + yz/ x^2

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III. ADJECTIVE + THAT CLAUSE : S + BE + ADJ + THAT CLAUSE (S + V) - I / am/ disappointed / that you failed the exam. 1. Combine these sentences using Adj + that clause : 0. He is worried. His business is not going well. -> He is worried that his business is not going well. 1. We were disappointed. She didn’t keep her promise. ……………………………………………………………………………………………………………………………………………………………… 2. I’m sorry. I came late. ……………………………………………………………………………………………………………………………………………………………… 3. The boss was angry. I misplaced all the documents. ……………………………………………………………………………………………………………………………………………………………… 4. I am happy. The article has been very well received. ……………………………………………………………………………………………………………………………………………………………… 5. We are glad. You come. ……………………………………………………………………………………………………………………………………………………………… 6. His parents are pleased. He won the best prize. 2. Make sentences with the words suggested: 0. I / pleased / work hard. -> I am pleased that you are working hard. 1. We / grateful / you / take / interest / us. ……………………………………………………………………………………………………………………………………………………………… 2. You / sure / her child / disappeared ? ……………………………………………………………………………………………………………………………………………………………… 3. No one / sorry / our manager / resigned. ……………………………………………………………………………………………………………………………………………………………… 4. Everybody / not surprised / they / divorce. ……………………………………………………………………………………………………………………………………………………………… 5. I / disappointed / you / not / see / me / yesterday. …………………………………………………………………………………………………………………………………………………