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phuonguyen19209ne
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tính $\frac{1}{(r+1)^{2}}$ + $\frac{2}{(r+1)^{3}}$ + ... +$\frac{(n-1)}{(r+1)^{n}}$
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I. LANGUAGE FOCUS: (4,5 ms) Choose the word that has the underlined part pronounced differently. 1 A. recycle B. vehicle C. helicopter D. reverse * Choose the word with the different stress pattern from the others. 2 A. accident B. dangerous C. argument D. however * Choose the best answer (A, B, C or D). 3 There ……………… a MRT station here, but it has disappeared. A. were B. used have C. use to have D. used to be 4 ……………… does it take to go from Ha Noi to Pleiku by plane? A. How much B. How many C. How long D. How far 5 You should ……………… right and left carefully when you cross the street. A. see B. look C. be D. take 6 I used to go to school ……………… A. with bike B. by foot C. in car D. by bus 7 When there is a traffic jam, it……………… me a very long time to go home. A. takes B. costs C. spends D. lasts 8 All of us have to obey …………… strictly. A. traffic B. traffic rules C. traffic jam D. regular 9 We should wait for the traffic lights ……………… before we cross the street. A. turn yellow B. turn green C. to turn yellow D. to turn green II. Reading: (2,5ms.)

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