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Rút gọn  $\frac{\sqrt{x}+1}{\sqrt{x}-1}-\sqrt{\frac{\sqrt{x}+1}{\sqrt{x}-1}}$
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VI. Put the verbs in brackets in correct forms. 1. What ______ do if you got fat? A. would you B. will you C. you would D. you will 2. If you ______ ten minutes earlier, you would have got a seat. A. arrive B. will arrive C. had arrived D. arrived 3. If you ______ more slowly,he might have understood you. A. speak B. spoke C. spoken D. had spoken 4. If it ______ convenient, let’s meet at three o’clock. A. is B. was C. were D. had been 5. If I had known that the baby was hungry, I ______ him. A. fed B. will feed C. had fed D. would have fed 6. If it ______ a lot, the rice crop wouln’t grow. A. don’t rain B. didn’t rain C. hadn’ rained D. wouldn’t rain 7. If he ______ interrupted, he can finish the work on time. A. wasn’t B. weren’t C. isn’t D. hadn’t been 8. If she had more practice, she ______ English better. A. spoke B. spoken C. would speak D. wouldn’t speak 9. If I ______ you, I ______ to him. A. was/ will talk B. will be/ talked C. would be/talk D. were/ would talk 10. If you learn hard you ______ the exams. A. will pass B. would pass C. pass D. would have passed VIII. Find one mistake in each sentence. 1. If you pass your examination, we would have a celebration. 2. What would happened if I press this button? 3. If you go to Paris where you will stay? 4. Unless you don’t learn hard, you will fail the exams. 5. If you were made redundant what will you do? IX : Supply the correct verb tense. 1/ We lost the match. If you (play) _______ for us, we (win) _______. 2/ So long as you return the book by Saturday, I (lend) _______ it to you with pleasure. 3/ They would not be paid unless they (do) _______ their work well. 4/ If he (give) _______ up smoking, as his doctor orders, he will be soon well again. 5/ Supposing World War III (happen) ¬________, human civilization (be) _______ destroyed. 6/ You won’t pass your driving test ________ you drive more carefully. 7/ He’ll be ill ________ he doesn’t stop worrying so much. 8/ We’ll go to the beach tomorrow ________ it’s raining. 9/ We’ll never get there on time ________ the train leaves soon. giải hộ em với ạ

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