Câu hỏi:
07/11/2020 218Read 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 from 30 to 37.
Humans have struggled against weeds since the beginnings of agriculture. Marring our gardens is one of the milder effects of weeds – any plants that thrive where they are unwanted. They clog waterways, destroy wildlife habitats, and impede farming. Their spread eliminates grazing areas and accounts for one-third of all crop loss. They compete for sunlight, nutrients, and water with useful plants.
The global need for weed control had been answered mainly by the chemical industry. Its herbicides are effective and sometimes necessary, but some pose serious problems, particularly if misused. Toxic compounds threaten animal and public health when they accumulate in food plants, groundwater, and drinking water. They also harm workers who apply them.
In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world’s weed problems. Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms.
The biological agents now in use are environmentally benign and are harmless to humans. They can be chosen for their ability to attack selected targets and leave crops and other plants untouched. In contrast, some of the most effective chemicals kill virtually all the plants they come in contact with, sparing only those that are naturally resistant or have been genetically modified for resistance. Furthermore, a number of biological agents can be administered only once, after which no added applications are needed. Chemicals typically must be used several times per growing season.
The word ‘clog’ in bold is closest in meaning to ........
Sách mới 2k7: Tổng ôn Toán, Lí, Hóa, Văn, Sử, Địa…. kỳ thi tốt nghiệp THPT Quốc gia 2025, đánh giá năng lực (chỉ từ 110k).
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Trả lời:
Đáp án C
Từ ‘clog’ in đậm gần nghĩa nhất với
A. cống
B. phát triển dọc theo
C. cản trở
D. nổi trên
‘clog’ = obstruct: cản trở, làm tắc nghẽn
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 2:
“Congratulations to you on passing the math exam.” “ _________”
Câu 3:
The Red Cross is an international organization that helps people who are suffering from the results of war, diseases or _______.
Câu 4:
Mark the letter A, B, C or B on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
We (A) are going to visit (B) our grandparents (C) when we (D) will finish our final exams
Câu 5:
Mr. Thompson is learning Vietnamese _________ to read Kim Van Kieu.
Câu 6:
Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation In each of the following questions.
Câu 7:
We oppose this war, as we would do any other war which created an environmental catastrophe
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