cho pt:\(x^2+2mx-2m-1=0\)
tìm m để pt có 2 nghiệm phân biệt thỏa mãn \(\dfrac{6}{x_1}=x_1+\dfrac{1}{x_2}\)
Mark the letter A, B, C or D to indicate the correct answer to each of the following question.
Question 13: You should have a dictionary to_________the words that you don’t know their meanings.
A. look for B. look up C. look into D. look after
Question 14: Mrs. McCarthy lives in a small flat_________having a lot of money in the bank.
A. although B. in spite C. despite D. even
Question 15: His car _________when he was only half way home.
A. broke down B. got down C. broke over D. got over
Question 16: The camera……….. Sarah bought yesterday was made in Japan.
A. who B. which C. where D. Who
Question 17: If I knew how to repair the machine, I_________ you.
A. would help B. will help C. help D. helped
Question 18: 'Well, your sister has never cooked well,_________?” Aunt Alice asked me.
A. hasn't she B. has she C. doesn't she D. does she
Question 19: The church near our school _________in the 16thcentury.
A. was built B. was building C. built D. builds
Question 20:The farewell party ended _________11.30 p.m. We were all tired but very happy.
A. in B.on C. at D. of
Question 21: Carthy got up early. _________, she did not catch the train.
A. Therefore B. However C. Although D. So
Question 22: _________is a festival which is celebrated in late March or early April in Israel and by all Jewish people.
A. Christmas B. Passover C. Easter D. Thanksgiving
Question 23: . Daughter: “Dad! I have just won the first prize in the Olympic English Contest.”
Father: “_________”
A. Congratulations! B. That’s a good idea.C. Thank you. D. I’d love to.
Question 24: "It's very kind of you to invite me to your birthday party?" -"_____"
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A. No, thanks B. Good idea, thanks C. OK. That's great D. It's my pleasure
Section D. Reading comprehension (2pts)
Part 1: Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that best fits each of the numbered blanks. (1pt)
Forests are useful to mankind in several ways. Wood is always necessary for building and for making all kinds of things and we usually need fire woods in our homes. Forests provide timber, one of the most (25)___________ resources, but they must be used wisely and managed carefully. Men should control the cutting of trees in such a way that the forest grows more trees (26) _________ it would be cut, leaving the young ones to grow bigger. Trees and shrubs are also needed to preserve land (27)___________ their roots bind the soil, preventing heavy rain (28)____________ washing the soil away.
Question 25: A. valuable B. reasonable C. comfortable D. famous
Question 26: A. as B. than C. then D. that
Question 27: A. because B. because of C. but D. and
Question 28: A. in B. with C. from D. at
Part 2: Read the passage and do the exercises that follow by choosing the corresponding letter (A,B,C or D) of the correct answers.(1pt)
Earth, our beautiful home planet, is the only astronomical object to accommodate life as we know it. Scientists believe Earth was formed approximately 4.5 billion years ago. It is the fifth-largest planet in our solar system. Its equatorial diameter is about 12,074 kilometres. Earth is the third-closest planet to the sun. The distance from Earth to the sun is roughly 149,600,000 kilometres. It takes 365.3 days for Earth to orbit the sun, and 24 hours to rotate on its axis. The surface temperature ranges from -88 to 58°C. Nearly 70 percent of Earth’s surface is covered by ocean, which has an average depth of about 4 kilometres. In 2015 it was estimated that 7.3 billion humans are living on Earth.
Question 29 . As we know it, Earth is the only planet that accommodates life. It is _________
A. habitat B. habitual C. habitable D. habit
Question 30 . In our solar system, _________ planets are larger than Earth.
A. four B. three C. two D. five
Question 31. There are _________ planets between Earth and the sun.
A. four B. two C. three D. one
Question 32. The hottest place on Earth may have the temperature of _________
A.-88°C B. 40°C C. 58°C D. 85°C