I. Circle the word whose underlined part pronounced differently from that of others.

1. A. around B. house C. youth D. sound

2. A. virus B. marine C. science D. lifestyle

3. A. university B. unit C. discuss D. computer

4. A. wanted B. raised C. needed D. waited

IV. Match the words on the right with the explanations.

tìm các số nguyên x,y thỏa mãn điều kiện 4x^2+9y^2-8x-6y-20=0

Cho tam giác nhọn abc có các đường cao AD,BE,CF cắt nhau tại H.Gọi K là giao điểm của AH,EF,N là trung điểm AH . Đường thẳng A song song với BN cắt BC tại M.Gọi P là giao điểm Mk và AB

a)CM tam giác AEF đồng dạng tam giác ABC

b)CM EB là phân giác góc DEF

Một người khởi hành từ tỉnh A đến tỉnh B. Khi đến tỉnh B, người đó nghỉ ngơi trong 2 giờ, rồi quay về tỉnh A với vận tốc lớn hơn vận tốc lúc đi là 12 km/giờ. Tổng thời gian từ lúc bắt đầu đi từ tỉnh A đến tỉnh B rồi trở về đến tỉnh A là 5 giờ. Hãy tính vận tốc lúc đi và về, biết quãng đường từ tỉnh A đến tỉnh B dài 80 km.

GIẢI TOÁN BẰNG CÁCH LẬP PHƯƠNG TRÌNH

Make question for the underlined part in the following sentence

1.Watching tv too much is not good because it hurts your eyes.

Make question for the underlined part in the following sentence

1.The children are playing tug of war now

Hoàn thành các câu sau, sử dụng dạng đúng của động từ trong ngoặc.

1.She (be) __________________ happier if her parents (not get) ________________ divorced.

2. If you (sleep) _____________ under a mosquito net you (not be) _______________ bitten so often.

3.If the weather (not be) _______________________ severe, out crops (grow) _______________ faster.if the weather (not be) _______________________ severe, out crops (grow) _______________ faster.

Đọc đoạn văn sau và trả lời câu hỏi.

Light pollution

Most of us are familiar with air, water, and land pollution, but did you know that light can also be a pollutant? Not many people know about this kind of pollution. Light pollution is the inappropriate or excessive use of artificial light and it can have serious environmental consequences for humans, wildlife, and our climate. Light pollution is a side effect of industrial civilization. Its sources include building exterior and interior lighting, advertising, commercial properties, offices, factories, streetlights, and illuminates sporting venues.

The fact is that much outdoor lighting used at night is inefficient, overly bright and, in many cases, completely unnecessary. This light, and the electricity used to create it, is being wasted by spilling into the sky, rather than focusing on the actual objects and areas that people want illuminated. For three billion years, life on Earth in a rhythm of light and dark that was created solely by the illumination of the Sun, Moon, and Stars. Now, artificial lights overpower the darkness and our cities glow at night. It disrupts the natural day-night pattern and shifts the delicate balance of our environment. Light pollution has negative impacts. It increases energy consumption, disrupts the ecosystem and wildlife and harms human health. Fortunately, concern about light pollution is rising dramatically. A growing number of sciences, homeowners, environmental groups and civic leaders are taking actions to restore the natural night.

1. What source of light does not contribute to light pollution?

A. moonlight B. streetlight C. offices D. advertising

2. What is NOT true about light pollution according to the passage?

A. People are so familiar with it.

B. Is has many bad effects on humans and the environment.

C. It is the inappropriate or excessive use of natural light.

D. It is a side effect of industrial civilization.

3. What disrupts the natural day-night pattern as mentioned in the passage?

A. artificial light B. darkness C. our city D. night

4. Which is NOT mentioned as the negative impact of light pollution?

A. increasing the use of energy B. disrupting the ecosystem.

C. badly affect human health D. balancing the ecosystem

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