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43. Be careful! That bike (break)..........is breaking................. 44. Lan likes (play)..............playing.........games on computer. 45. He ia tall enough (play)..............to play............basketball. 46. When I was a child, I (study)........studied................hard 47. I (live)...............have lived..............here since last week 48. They (know).........have known..............each other for four years 49. My sister loves (read)...........reading...............in her free time. 50. My sister is old enough (drive).........to drive.............a car.
45. I am preparing for the picnic .................my friends tomorrow.
A. at B. to C. in D. with
46. Kangaroos, which come .................Australia, have long tails.
A. to B. in C. from D. for
47. Mount PinaTubo, ..................is a volcano in the Philippines, erupted in 1991.
A. which B. who C. whom D. whose
48. We ...............since we left school.
A. don't meet B. didn't meet C. won't meet D. haven't met
49. In 1995, a huge earthquake ................the city of Kobe in Japan.
A. strike B. struck C. striking D. striked
50. I can't hear what you are saying. Can you................the radio?
A. turn on B. turn off C. turn up D. turn over
51. Neil Armstrong, .................walked on the moon, lived in the USA.
A. which B. whom C. who D. whose
52. UFOs mean ................flying objects.
A. unknown B. unidentified C. unable D. unimaginary
53. There is no ..................that he has been here.
A. evident B. evidential C. evidentially D. evidence
54. Do you think you will be able ................a space trip?
A. take B. to take C. talking D. taken
55. If I ..............a bird, I would be a drove.
A. am B. is C. are D. were
56. If we became rich, we would travel .................the world.
A. on B. in C. at D. around
57. She would come to see you if she .................your address.
A. have B. has C. had D. having
58. Where will you go if you ................a car?
A. have B. has C. had D. having
59. Where would you go if you .................a car?
A. have B. has C. had D. having
60. This test must be done....................
A. carefully B. care C. careful D. careless
Ta có : |y - 2017|\(\ge0\forall y\in R\)
Nên A = |y - 2017| + 2018 \(\ge0+2018\forall y\in R\)
<=> A = |y - 2017| + 2018 \(\ge2018\forall y\in R\)
Vậy Amin = 2018 khi |y - 2017| = 0 <=> y - 2017 = 0 <=> y = 2017
GTNN=2018
ta thay vay nha
|y-2017| phải có giá trị nhỏ nhất mà ta biết giá trị nhỏ nhất của nó là =0
do |y-2017|+2018=0+2018=2018
cau duoi =2
Above : ở trên
Behind : phía sau
In front of : ở đằng trước
Between : ở giữa
Next to : bên cạnh
Under : ở dưới
hok tốt :D
ở trên
phía sau
ở đằng trước
giữa
kế bên
dưới
chúc bạn học tốt
nhớ cho mình nha
Từ biểu thức, suy ra:
(x+1)2=0
Thay x=-1:
(-1+1)2=0
02=0(hợp lý)
Vậy phương trình có nghiệm x=-1 duy nhất
3564+478=4042
6462-45=6417
3564+478=4042
6462-45=6417
chuc bn hok tot nha