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Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions
This is __________ the most difficult job I’ve ever had to do.




A.by chance
B.by myself
C.by far
D.by heart
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Read the following passage and then choose the most suitable word or phrase for each space.
Health experts suggest that (42)_____ healthy and happy, it’s important to keep our lives in balance. Chinese philosophy, which has spanned thousands of years, uses the principles of yin and yang to explain the importance of balance in life. Explained simply, the Yang represents the active elements of the universe, whereas the Yin represents the passive ones. This expresses the importance of balance in (43)_____ of living. Today health experts agree that it’s important to have a balanced life. For example, they’ve said it’s necessary to have a balance between work and rest and to have a balanced exercise program. (44) _____, I’m sure you’d agree that in our busy world, it’s not always easy to get and keep balance in our lives.
Due to business or study deadlines, many people work to excess, leaving little time at the end of their busy day to spend with family and friends. They eat fast-food and don’t get enough rest or recreation and then suffer badly from the effects of stress. It’s sad that this situation often happens when people believe that access to (45) _____ is the answer to happiness instead of understanding the importance of balanced living.
While ambition can be a good thing, having too much ambition can cause a person to become “out of balance”. Of course, it’s also unbalanced to spend too much time on entertainment and pleasure activities, with little or no time (46) _____ to work or education. Balance means allocating enough time for all the important aspects of life, such as spending time with family and friends, working or studying, as well as resting and relaxing.
(42)_____




A.to stay
B.to protect
C.to look
D.to preserve

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's occurs.
Based on this relationship, scientists from the University of Lund in Sweden and the University of California at San Diego designed an experiment to test whether doses of nerve growth factor could reverse the effects of memory loss caused by Alzheimer's. Using a group of rats with impaired memory, the scientists gave half of the rats doses of nerve growth factor while giving the other half a blood protein as a placebo, thus creating a control group. At the end of the four-week test, the rats given the nerve growth factor performed equally to rats with normal memory abilities. While the experiments do not show that nerve growth factor can stop the general process of deterioration caused by Alzheimer's, they do show potential as a means to slowing the process significantly.
According to the passage, where is nerve growth factor produced in the body?




A.in red blood cells in the circulatory system
B.in the pituitary gland
C.in nerve cells in the brain
D.in nerve cells in the spinal column

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