Only after the teacher had explained the procedure clearly___________to go ahead with the experiment.
A. the students were allowed
B. were the students allowed
Đáp án B
Đáp án B - câu hỏi đảo ngữ
“Only + liên từ + mệnh đề” đứng đầu câu là dấu hiệu của đảo ngữ trợ động từ lên trước chủ ngữ, vì thế nên, hai đáp án A và C bị loại do không có đảo ngữ.
Động từ “allow” (cho phép) là ngoại động từ, sau nó phải có sb/sth (tân ngữ), nhưng trong câu này không có, nên phải để ở dạng bị động (be + P2). Vậy nên, ta chọn đáp án có bị động và đảo ngữ là đáp án B.
Tạm dịch: Chỉ sau khi thầy giáo giải thích quy trình một cách cặn kẽ thì sinh viên mới được phép thực hiện thí nghiệm.
* Mở rộng: Ngoài trường hợp “only + liên từ + mệnh đề” thì ta còn có “only + giới từ + Noun/ V-ing” cũng là dấu hiệu của đảo ngữ; ví dụ: Only on Sunday do we have a day off (Chỉ vào ngày Chủ nhật chúng tôi mới được nghỉ).While I was looking through my old albums the other day, I___________this photograph of my parents’ wedding.
In spite of the Indian lacked animals, they had the ability to cultivate plants suitable for daily use.
The commission estimates that at least seven companies took___________ of the program.
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 questions front 43 to 50.
Homeopathy, the alternative therapy created in 1796 by Samuel Hahnemann, and now widely used all over the world, is based on the belief that the body can be stimulated to heal itself. A central principle of the “treatment” is that “like cures like”, meaning a substance that causes certain symptoms can also help to remove those symptoms. Medicines used in homeopathy are created by heavily diluting in water the substance in question and subsequently shaking the liquid vigorously. They can then be made into tablets and pills. Practitioners believe that the more a substance is diluted in this way, the greater its power to treat symptoms.
However, in a new study, a working committee of medical experts at Australia’s National Health and Medical Research Council (NHMRC) has claimed that homeopathic medicines are only as effective as placebos at treating illness. Their research, involving the analysis of numerous reports from homeopathy interest groups and the public, concluded that there is no reliable evidence that homeopathy works. Moreover, researchers uncovered no fewer than 68 ailments that homeopathic remedies had failed to treat, including asthma, sleep disturbances, cold and flu, and arthritis.
As a result of the findings, the NHMRC is urging health workers to inform their patients to be wary of anecdotal evidence that appears to support the effectiveness of homeopathic medicine. “It isn’t possible to tell whether a health treatment is effective or not simply by considering the experience of one individual or the beliefs of a health practitioner” says the report. Experts believe that most illnesses said to have been cured by homeopathy would be cured by the body on its own without taking the medicine. Apparently, many illnesses are short-lived by their very nature which often leads to people believing that it is the homeopathy that cures them.
A more serious matter is highlighted by Professor John Dwyer of the University of New South Wales. As an immunologist, he is concerned about homeopathic vaccinations on offer for diseases such as HIV, tuberculosis, and malaria, none of which he considers effective. According to Professor John Dwyer, the concept that homeopathic vaccinations are just as good as traditional vaccinations is delusion, and those who believe it are failing to protect themselves and their children.
Which could be the best title for the passage?
The man was very brave. He___________, but he chose to stay and fight.
Visitors to the local museum are mostly attracted by___________ rocking chair.
Her parents are really strict. They rarely let her stay out late, ___________?
Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
He was very tired. He agreed to help me with my homework.
After years of training hard, the athlete finally could___________ her ambition of winning an Olympic gold medal.
The company has made an announcement that any application___________ in after 30th April shall not be considered.